You could go the cheap route an just put late model Mustang seats in it. I went to the junkyard and got 96 seats for mine. They are a WHOLE lot more comfortable than the originals and are a breeze to install. I also got the back seat and I am pulling the fabric off to cover my original back seat so they match.
I just dropped a set of 98 buckets into my 68 this weekend. Wouldn't describe the install as 'a breeze', but turned out to be that I didn't have the right tool to pull the 5" high tracks off the 98s and swap with the 2" high ones from the 68. (Anybody interested in a pair of blue 68 seats, decent condition, currently located in NM?)
The trial by fire, though, was while I was installing the seats. The box with the hardware for replacement seat belts was in the car. So was my 2 year old. After awhile I noticed that she was being very, very quiet...she had thrown the hardware, one piece at a time, into the box around the shifter where a gasket should cover up the hole.
Took it apart down to the newly installed carpet and fished with a magnet and forceps...all pieces were recovered, but the air was blue.
Perhaps "breeze" is a relative term. Compared to some other things I had to do, this was pretty easy. I had to drill a new rear hole in the track to bolt the seat to, but other than that it was pretty much in and out.
And aren't kids wonderful helpers? Who knows how you might have wasted away those hours you spent digging parts out of your "shifter pit". Sounds like ice cream time to me! ;-)
Saleen sells new take-off leather Cobra buckets for $500 a pair - at least that's what they quoted me in June. They were sold out then and suggested I call back every week cos they tend to sell out quickly after a bunch of new cars arrive...