Also if you buy them separated make sure both serial numbers are following themselves. Otherwise, you might get a non-matched pair. I've heard there could be a 8dB gap between two mics if they are from a different batch.
call the guys in longmont.
matched pair of 4061s didnt exist as a product in the d:vice package i subbed 4061 for, they hand matched them for me and had them out that afternoon
top notch