Sad indeed. Yello Belly isn't the best place to race in the world. Even being there to spectate requires safety equipment, at minimum a gun. From what I understand Blakes car was a serious piece of equipment but lacking the proper safety.
Believe it or not a large majority of the retractor problems can be fixed with furniture polish (i.e. Lemon pledge) sprayed on the belt when fully extended.
And there you have it. LAST year. Prices are going up on late '70s and '80s cars. There was a wall at about 1984 until recently. Seems to have been pushed down this summer and now the later 80s cars are moving upmarket as well.
Again, goto the sms site and request a sample. Here I did it for you. Follow this link, fill out the form and submit it. They will mail you a free sample if they have the upholstery. If it what you need then you call them and order it. When it arrives, find a local shop to do the repair