1. Revell's T-80B to a T-80U series?

It's really hard to create a conversion to these kits as ..... practically all the kit have to be replaced - where is a difference with a new kit (at least it'll not be necessary to buy Revell kit for few parts).

2. Trumpeter's BTR-80 to BTR-80A - when You have ACE MTLBM-6MB - conversion is on Your hands - BTR-80A turret is inside of that kit.

BTR-80 to Nona SVK - most of necessary parts available from ACE 2S9 Nona kit, while some additional parts still have to be made for turret.

BTR-80 radio must and BREM-K are more interesting ideas for resin manufacturers as not worth to create metal moulds for items that can be sold in a very limited numbers.