Why not just set up a small Intel mb or laptop mb in your 2000 with dedicated ram and hd and video capture. Even power supply. There's enough room.
You can use a separate XGA / HDMI output to a modern monitor.
Then you can plug your Amiga video out into the video capture card on the PC board and use simple software to display the Amiga screen on the PCs Screen.
You now have modern hardware emulating A2000. Just takes a good deal longer to get the Amiga screen up.
