FWIW I was able to order one of these last year by emailing
kohtec@hanmail.net (which was the contact email for the mestos site). It was $145.50 USD shipped and he mailed it the next day with tracking. I ordered on 5/22, he shipped on 5/23, and I received it on 5/26. I haven't taken it off much since then. It's heavy, but usually when I want to go light, I take off the whole battery grip and the L bracket stays attached to that. It's very well made and you don't have to remove it to switch the grip battery out.