I've never heard of MultiTaskerTools. Are they in any way affiliated with CRKT? Did this representative work for CRKT at some point that he would know this information as fact? How does being a representative for a company that manufactures mutil tools for firearms give him the inside track on how CRKT does business or who they use for OEM? If this is proof then we have different ideas of what proof is. I can't just take some guy's word for it because he says it matter of factly.
Actually, a better question is why would you doubt that SanRenMu is making knives as an OEM for larger companies? SOMEONE is making knives in China for Spyderco, Kershaw, Buck and CRKT, and the latter three have lifetime warranties on their Chinese-made pieces.
Why couldn't it be the company that looks like someone taught them a heckuva lot about knifemaking in a very, very short period of time (SanRenMu's only been around since the late 90s).
It actually seems very odd that you're resisting the idea that SRM could be an OEM for more established brand. Everybody and their dog is saying that the quality of the pieces they produce is surprisingly good - that kind of manufacturing knowledge, technical skill and design capability doesn't just kind of spring out of nowhere.
Opening your own factory and training workers in a foreign country is a massively, massively expensive venture for any company, to say nothing of trying do so as a smaller producer of specialized items.