Yep that is about the same that I found for my 64. Not enough demand.
Trying doing any search on any Tempest to look for interior pictures of cars with split bench seats. They are almost non non existent. Almost all the cars have buckets and seem to be GTO clones.
Was that your comment that I saw that said I want to build one of those rare tempest cars instead of thoes common GTOs
If funds were no object I wouldn't think twice about going the SMS route, just because of the fact of how rare it is to see one with the correct two tone vinyl. Again I would be looking at a little over $2K to have that done.
The other route is just go with one of the other PUI seat covers. Only the 66 ones would allow me to do it in a matched set. I would still have $1K in them after buying foam and having a pro do the work.
With all the research I have done now I'm still not sure what direction to go.