I remember a few years back some discussion on whether somebody was going to re-pop the custum deluxe burb interiors
as they have different fabric inserts on the seats. Does anyone do this?

I certainly HOPE so! I need em!

Check with Cars, Inc. They made a Custom/Deluxe seat cover for the front seat of my Suburban, but I can't remember if they offer these for the center and rear seat. They made my cover using NOS cloth and repro vinyl, so they can probably do it. Their website is www.carsinc.com. A little pricey, but excellent quality.