The air tool one is available on Summit Racing's site, I picked one up years ago for under $20. There are also pegboard version of the cordless tool holders, I think I grabbed them at Home Depot for a few bucks each, they work good for holding drills, impacts.
Any chance you have a link? I googled the name and found their site but I don't seem to be able to find the racks.
Link: http://www.hrpracing.com/search?q=hrp6395
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Thank you Sir.
Do you buy some? Did you like them?
Looked at another way, at $16.95 each the cordless tool holders are too cheap to bother making your own, unless you place no value at all on your time.
Same goes for the air tool holders -- even if you got free materials you'd spend a lot more time farting around with it than it's worth.
Of course, if you have the spare time and scrap and just want to make something useful yourself, that's understandable as well.

