There's some shops that will build them for you in Texas , big $$$$ though . Thats if you dont find a used one . Here's a link to the folks that are building mine.
texashaulers.com
call me road hand when you go get yours, i want to meet you down there and have lunch.
Kings truck beds in boyd, tx does some pretty nice work and they are pretty fair on money too.
there are a few on craigslist in texas.
i have one right next door to tx. its on craigslist. okc, dallas, tulsa. red 89 dodge. will sell bed seperate. good bed.
www.pipelinebeds.com
Turn around time on a bed is 9 days from start to finish, painted and mounted. He does REALLY nice work.
send me a line I'll build like you want it