Bruce,
I am posting a picture of the original seat frame I installed in my 28 special coupe. Your 29 business coupe seat frame is the same. I found a decent original seat frame, which is better than the repros and also have the rivet holes already in them. I have an extra original seat frame I bought on eBay a couple years ago. I have a few more pictures of the seat frame I installed in my coupe, but the one posted shows it the best. If you need other pictures, PM me.
Rusty nelson
