I do have the copy of Beyond Brawn and even though i've not approached any-one to make one up i suspect it will be cheaper to do so.
I have looked on the internet at a whole load but most do not seem to have that much real adjustment. The price is a factor too.
Mind you i like the look of the Powertec one .....
http://www.powertecfitness.com/power_rack_systemo.htm........ but it's one thing seeing a picture and another thing knowing if it is suitable.
Cheers.