I would stay away from the "Pro" setup. I have plenty of locking biners that will work just fine. Knife Center offers just the belt for about 32 bucks.

If I am going into a technical situation, one of the first things is a proper, well fitted harness. This is from a guy who did his longest rappel ever, 580 feet mostly overhanging, in a swami seat tied from 1" webbing. This was before harnesses were available.

In my case, with my lead climbing and SAR days well behind me, for the last several years my technical efforts have been directed toward rigging in steep terrain in the Channel Islands (USA) to retrieve either archaeological or paleontological stuff from steep cliffs. In fact, I keep a stuff bag loaded with harness, helmet, rope. slings, and biners just for this purpose. I am planning more activity once again on a very interesting project later this year.

There are lots of riggers belts, and rigger-like belts available, but this is one of the few that is credibly certified and yet also works as a normal belt. It is essentially one more arrow in the quiver - a multi-purpose item which can reliably function in a technical environment. When I go over the edge this August in my BD harness, this will also be around my waist, ready to perform who knows what....

I am always comforted by having the means at hand to improvise.