Lemme Chime in with Tom
Guy I just bought the DIN bracket and template and instructions radio conversion kit from Vette Specialties (I think) out of Colorado for (I think) $70 - advertised right in the back of the same issue as your "Killer" article.
This package included one formed sheet metal piece simpler than that bracket and some simpler instructions and templates. The piece was nicely finished. I think this was a decent price and am looking forward to putting it in to have a normal radio, assuming my heap keeps running long enough to do more to the sound system....
If you had a pile of those brackets made from some local shop or got fast enough at doing them yourself, you'd probably get the per unit cost down to $2-5. This conversion is rugged and straightforward, but not as simple as that DIN radio upgrade.
You should price it around $100-125, I would think. Don't cut yourself out of this. If you're not interested in that much overhead, maybe you should contact the smaller specialty houses like you mentioned in an earlier thread on this topic to see what they would consider - but get the idea secured to yourself first. (A lot of people cruise this 'site, you know.)
I will buy it at any of those, and would have no problem making the bracket for myself (I'd probably use steel so I can cut it with a torch in 2 shakes...)
The only reason I didn't respond to that other thread about having it done is can't be without my car for even. one. day. I. can't. take. it.
A DIY kit is a whole other deal though. I've been playing with running a solenoid to isolate the vacuum system to the headlights when not turning them on and off to protect the engine's vacuum source - either than or running a crank driven vacuum pump. Making these things electric solves this problem entirely.
By the way, just how much stress is on that bracket? Isn't it about 3" wide by 4" long at the biggest on each "wing"? Would one made out of nylon or teflon roughly 1/4" in thickness be rigid or strong enough do you think?
P.S. I was the guy who first voted "No. Come up with a better plan for us." This is TOO CHEAP!!!!