dec plastic panel mounts - ordering?

I was showing someone my collection, and while standing in front of my 11/45 restoration project I lamented about how those little black plastic brackets that attach to the upright rails just can't be found anymore. You know the ones... the bracket has two round knobs that always break off - these are used to mount DEC filler panels. He said he knew a plastics firm that may be able to do a short run at a reasonable price. Failing that, he felt another company he knows of may be able to make them out of metal. This gives rise to two questions... 1) Would replicas made of metal work as well as replicas made of plastic? 2) How many people would be interested in some if the price is reasonable? And how many? I know a few of my systems I'd go back and use 4 brackets on each panel instead of the 2 I skimped on. In addition, a few racks I simply couldn't mount filler panels at all because of no brackets. Of course, before the guy can quote me a price I need to give him a firm minimum count. The more in the firm count the lower the price is. I figured I'd order 40 or 50 if the price was reasonable. But I'm sure my own order would be cost prohibative unless other collectors jump in. On the other hand, if some collector has a big crate of these, I'd rather just buy pile of originals :) Jay West