Have a look for the CV64 (not the CV64-3D). It has pass through so you can hook it up to the scandoubler in the A2000's video slot. Ive got a Microway flicker fixer in my A2000D and its connected up to the CV64.
Weed
If you have a CV64 (non 3D version) connected to an Amiga 2000, then you would be one of a kind. The CV64 is Z3 and A2000s are Z2 only.