well, judging by UMLab holding my 3 driver for 2 weeks now and not saying anything about completion time... (via ciem.com). (re: UMLab move on their FB page)... So now is probably not a great time to go with UMLab? 'i haven't heard anything from umlab, they're very busy with backorder after the move, I'll let you know as soon as I hear something, but it's best not to rush them so they don't mess anything up' (not a verbatim quote, but pretty close) is not a response I want to hear when I ask whether UMLab received my IEMs and when can I expect my IEMs that UMLab did not produce to the order specs twice (making the same mistake). At least Stephen refunded my Mage that I sent in along with my 3 driver (for a refund, not reshell)....
1964 sounds interesting, they say " Tuning earpiece to match original Frequency/Phase response" (kozee say the same. Whether either of them really do that - who knows)
I'm pretty sure most other companies do not do that. In fact, most people say to expect something different from a UM reshell (and that's what happened to my sm3v1 to a custom sm3).