I am looking for three things, and will also tip if someone can find
them for me (not looking for an option to buy $1000s of dollars worth,
just need a sheet or two of the materials spelled out below).  For an
R&D project, we would like to find someone who will provide as a
sample or sell us a couple of sheets of the following:
1) ABS in thicknesses around .010, ,015 or .020.  We realize they come
standard at .060 and also have gotten .030, but we need to find
thinner.
2) PETG in .010.  Cannot find it in less then .020, and do not want a
1000 pound run just to check it out.
3) Polystyrene in less then .030 that is not HIPS (High Impact). 
Looking for sheets of OPS (Oriented) or even MIPS (Medium Impact) or
other styrenes that we could thermoform and would be more rigid then
HIPS.  Expect .015 to .030 of these materials to be desired.

Any comments or ideas from other people would be appreciated.  The
requests above are not easy ones, but should not be impossible.

Thank you.