[R-390] Black Anodizing?

[Barry]

Anyone know of a good source for black anodizing?  I have eight small
aluminum parts (1.5" x 1.5" x 2.25" aluminum tubing (4pcs) and 1.5" x 1.5" x
0.125" plate (4pcs)) I would like to have black anodized.  These are the new
filter cap housings for my R390A.  I'm going to try to find a local place
that will do these -- hopefully in with a batch of other stuff so minimum
charges won't make this cost-prohibitive, but I thought you guys might know
where I can get this done very reasonably.

By the way, this is a new design for replacement caps that doesn't involve
gutting the old caps.  I plan to post some pictures when I get them
finished.

Thanks,

Barry - N4BUQ