I got myself a 3rd party grip for my K-7 (D-BG4)
There are two versions of the 3rd party grips.
Type 1. A plastic lug version different from the genuine
Type 2. A metal lug version that is nearly 100% the same as the genuine
I got the type 2. Just posting this to let AP Pentaxians know the difference.
Mine cost AU$68 delivered via eBay (Hong Kong) !