It’s a Kinfire. I can’t remember where I got it, but it wasn’t common. I only could find this 4 x XML version on the one site. It’s probably not in production anymore. Good luck.
BTW, Ouchy, you really got me wanting to try your TR-J12 MT-G2 mod! I wonder how it would handle a XHP50/07 swap? Then again, I love the MT-G2 output. 