I'd recommend a few places.
Strike Hard Gear
They make some very good products for Soviet weapons. I have some of their Mosin Nagant items.
Kennedy Nylon Designs
This guy can do custom orders. He does have a 2-mag and 3-mag shingle that has PALS/MOLLE webbing on the front. He can work on about anything. He's modded some East German gear for me.
7.62 Tactical
This guy is good as well. Have his piggyback pouches. Also have ordered the AK pull tabs. Good maker, but a little slow on shipping.
These three will work with you on custom items to some degree. However they're small shops and have some wait periods. Good thing is they're aimed at the AK world, not just taking a M-16 pouch and modding it to AKs. Also their prices are reasonable compared to other brands.
On a side note, I have taken USGI 3-mag shingles and added AK pull tabs to make some really cheap AK pouches. Did that to my issued FLC vest with the shingles and can run both AR and AK magazines in the pouches.