How about the Hollis HTS 2?
Which? I did a quick Google Search.
LeisurePro -
Hollis HTS 2 Harness Technical System $369.95.
"The Hollis Gear (HTS) Harness Technical System can easily switched from a single tank soft pack to a dual tank back-plate system, the modular capabilities of the HTS may be personalized to your needs. This streamlined modular harness system has a comfort back pad with lumbar support and stainless-steel D-rings on shoulders, waist and crotch strap for accessory attachment. The waist strap, crotch strap and shoulder straps are manufactured from durable 2" (5cm) nylon webbing for strength and long-life performance.
The harnesses torso adjustable shoulder, sternum and crotch strap all are equipped with "squeeze-style" side-release buckles for easy donning and doffing. The sternum strap has 2-mounting positions for a more custom fit. The waist strap also comes with a (removable) cummerbund and has a stainless-steel "latch-style" buckle. Mounting of the cylinder is made easy with the dual non-slip cam bands with plastic non-corrosive cam buckles.
The HTS can accommodate the Hollis Gear S25 & S38 Wings (see SKU: HLSLXW) without the STA and Optional 10 lbs. (4.5 kg) interchangeable quick-release weight pockets with stainless steel D-rings. And now has an added carry handle. The harness system weighs 8 lbs. (3.6 kg)."
Ah, it doesn't come with a wing or integrated weight pockets?
DiveRightInScuba -
HTS2 Singles BCD Package - $869.85. Price can include the ST 35 wing. I see a pair of quick release integrated weight pockets in the product photo.
For my Hollis BP/W, I added 2 trim pockets, one for each cam band.
It reminds me of my rig, except I've got an AL backplate and this thing has a "Comfort Back Pad w/Lumbar Support."
Sounds like a BP/W system with a soft plate?