How to exactly match 60's Eames 670 Lounge Chair Leather?  

Hello all, it seems that like myself, many of us know way too many details about some of these classic modern designs. Here is a test!
A sizable set of 670 parts has joined me and I have been left with many sets of armrests, which have leather in awful shape. There are also a few fiberboards with down fillings, though no usable leather. As I have a couple of chairs missing armrests (both in black leather, with down fillings, from early 60's), I was curious as to whether anyone knows where and how I could get the exact type/color/grain/gloss leather used on them. It appears that the 60's chairs were a semi-gloss leather and the leather was supposed to be glove leather. One way or another, I have pristine examples that can be sent out to match, but who should they be sent to? If anyone has any ideas, I would love to hear them!
A fellow collector had suggested sending something like an armrest to tandy leathers and have them match it. Does this seem reasonable? Has anyone had a similar experience with their own pieces? I would love to end up with armrests that blend in with my vintage cushions rather than standing out like a sore thumb, as some recent Herman Miller armrests would (more of a matte leather).
Thank you!