To GN78:
I know your post was in April, but I wanted to add my 2 cents. I am currently in the process of installing a set of factory upholstery covers from carupholsteryguys.com, $239 I believe. I bought the set back in December but didn't get to the interior restoration until a few days ago.
The covers are too big and require cutting and pasting to install right. Specifically, the bottom seam with the plastic strip that folds into the bottom seat frame is 3 inches too long. I rechecked the product number and it is the right one for my 1980 Spider FI. However, It's too late to return the merchandise.
The local shop (and one of the best custom trim shops in the business, in north Texas) wanted $500 just to install the covers. This is after I already stripped the seats, hammered out dents, welded the cracks, welded in new support bars (gangsta seats), painted the framed, and glued up the foam pieces. Upon showing the shop the project, they immediately pointed out the covers would need altering. $500 to install was out of my budget.
I am taking pictures of the undertaking and will post them in a few days. In a nutshell, I cut a 1.5" section from the bottom plastic strip, one at each corner of the front and sewed a dart 2.5" long. Then I closed the strip up using a 6" piece of the plastic strip from the old seat cover. Also added 1" of Nufoam padding over the bottom foam cushion. I only did the bottom of one seat so far. It is a LOT of work
. But I am pleased with the results
, ok, some puckers and bumps, and it laid out pretty smooth on the top surfaces.
My complements to Foster for his outstanding interior work and ideas on his Spider's interior. His bungee cord idea worked way better than those difficult hog rings.