kt-mech.com makes their Akela for the 40MOS with a lot of options.

I've been checking them out for my 40MOS, but want to check out Simply Rugged now after seeing this thread.

The KT Akela as multiple mounting options, including a receiver system to make switching from belt to pack waist strap simple, and that's something I like.

They can make them to accommodate a weapon light system, level 2 retention, etc.

Price increases, of course, as you add options.