There's a place here called M&M Glass, they do interior work, windshields, custom interiors, and convertible tops. They are good and have been around a while, just a bit farther than 100 miles from St. Louis.
The best bet is to ask other convertible owners in your area for installer recommendations! Most convertible guys know who does a good job or bad job, as there are not too many installers out there and word of good ones is like money in the bank!
My best guess about the price is around $1000 for the materials and labor to install a top correctly! Geof
You're right. Doesn't matter what make the top is on - if it's good it's good and same for it being bad. Was kind of thinking the same as for the cost. Thanks!