Who here hates it when you find exactly what you need at a reasonable price, only to discover that there's a minimum order that greatly exceeds it?
Show of hands?
Me too!
http://www.howardglass.com/home.htm
This place has an excellent selection of useful glass products for photographers. They have front surface mirrors (perfect for reflex cameras, TLR or SLR), opal & etched glass (ground glass) and just a wide variety of glasses in different thicknesses and for very reasonable prices.
The kicker is that there's a $65 minimum. What I need only costs $1.70. If
anyone needs something that this company supplies, let's go in on a group buy.
If you're interested, let me know and we can work out the details at that point.
Alternatively, you could just tell me where to get 1.2mm thick glass cut to specifications.