Check out the Kosola and Associates STC (SA 02454AT) for an inertia reel installation. It is virtually indistinguishable from a factory setup. I want to say it was close to $3K or so for the front seats but well worth every penny.
They also have half priced appetizers during happy hour. Their nacho platter had to be five pounds easy. I thought we might have to land in DKB for a nap on the way home.
@Terry M - 3CK (Chicago) Ironically, of the guys I know, most own certificated airplanes. EAA 790 publishes a monthly newsletter. You might consider running an ad looking for a partner and I'm certain some opportunity will crawl out of the woodwork.
I should be there around 930a this Saturday. A small group from EAA 790 at 3CK is planning to meet for breakfast if weather holds out. Hope to see some of you there.