I have a similiar problem. I work for the DoD and recently inheirited an incomplete project from a contractor. The project was started in 2002 and they choose the ACEX 1K EP1K FPGA. Seeing how the latest software doesn't support the product, I'm looking for a simple replacement. One with the same pinout ect so I can just plop in the new device. I have been trying to call Altera all day to see if they have a newer product that would satisfy this condition, busy phone they have.
I've looked through the pinout sections in the documentation, but the ACEX 1K pinout format varies vastly from the other FPGA's.
So I'm guessing the answer to my question is no, but I figured I would throw it out here incase someone has a quick answer.