2 things I have never seen;
1- a DMV official who knew anything about VIN locations on cars more than 20 years old, or that there even was any difference in where the VIN was stamped on cars over the years.
2- a DMV official who would admit he/she was wrong or didn't know something.
True story: about 15 years ago I took a '66 Fairlane I bought to the local DMV for a new title. The clerk told me I put an incorrect VIN on the transfer form and handed it back to me without even looking at the old title. I double checked the title, confirmed I wrote the VIN correctly, then asked her what was wrong? She told me there wasn't enough numbers there, I must have missed some when copying it onto the form. I showed her the title and mentioned I checked it against the VIN on the car myself before I drove it away from the seller, at which point she took the whole pile and swore there had to be an error on that title. She went into the back to show it to her supervisor. When she came back a few minutes later she just sat down and started typing, never once admitting she made a mistake or didn't know that in '66 the VIN didn't have as many digits.
As Bighorse said, pop a fender loose and look for yourself, don't take their word for it that they looked in the correct places. Even if they did look in the right place, on a 34 year car maybe dirt made the VIN illegible, or maybe the lighting wasn't very good and he just missed it, or maybe he just didn't feel like checking and had a cup of coffee while the new guy tried to see a tag under the fender without actually unbolting the fender.
Beyond this, I would call the PO and ask why the dash VIN is missing and if it's possible he still has the VIN plate (it's a bolt on part easily removable with the dash in '71-'73 cars). Secondly, I would take a rag lightly dipped in acetone and try to remove some of the paint off the door tag. If you can make any portion of it at all visible you can use the VIN you have off the old title to get a replacement tag from Marti. As long as there is some verification that the original tag is damaged and you are just trying to restore the correct data on the correct car Marti can provide a valid door tag for you. Once you have the new tag correctly positioned where the old tag was removed you can go back to get your title work done. If they ask you about I'd just say you carefully cleaned the paint off the tag, I wouldn't admit to replacing it. They can get kinda funny about that sort of thing. With a good VIN on the door tag matching the title to be reassigned the MVD shouldn't have a reason to place a bond on it. Personally, with all the fraud and scams surrounding classic cars these days I would go to great lengths to keep the title clean and free of notations like "bonded", "salvage", or "rebuilt". However, worst case is you do get a bonded title. Bonds are not permanent. It's simply insurance in case a previous owner turns up claiming your car is in fact his car with a fraudulent VIN to hide that it was stolen. Bonds are usually only good for 5 years, but can go longer in some cases. If you have to get a bonded title ask them how long the bond will be for, and more importantly, who pays for the bond fee! That fee might be reason enough by itself to do what's needed to avoid a bonded title!
"It's not having what you want, it's wanting what you've got!" - Sheryl Crow