Just received my XDM OSP Elite yesterday. Bought a Holosun 407 to put on it. Mounting plates did not come with my gun. Had to sign up to receive a free one in the mail. Got co formation this morning and was informed of an 8-12 week lead time ? Horrible ! Any idea where I can purchase a mounting plate for the Holosun 407 ? It’s the same footprint as the RMR . Any help would be appreciated.