http://www.tacomaterritory.com/forum/showthread.php?t=128886 FYI: TTORA member Bondo has posted an illustrated writeup of his DIY bow-hung headliner replacement.
I had a black suede headliner sewn for my truck for 100 bucks including material. It takes a experienced interior guy 30 minutes to make a little headliner like that. Installing it was a PITA but it was a hell of a upgrade for 100 bucks