I have worked this part out in my sheetmetal shop:
I propose making it from .024 Stainless Steel. I think I can offer it @ about $20 as this would cover the setup and hand bending costs (the radius has to be done by hand)
This cost could come down if I knew my batch would sell out or I should setup and make more. I have 3 interested folks, Kerem, Nigel and David. Are there anymore?
Edited: 23 Feb 2012, 8:27 p.m. after one or more responses were posted