Sorry Dave. Seems there is no ARM bases PSoC pin compatible with the PSoC1 device....
There are definitively no pin-compatible PSoC 1 and PSoC 3/4/5/6. There are not only differences between the underlying MCU but the internal hardware resources are quite different.
I would suggest you to get acquainted with PSoC4which can be used to replace most of the PSoC1 functionality and offering a lot more internal hardware resources. There is a prototyping kit which allows for programming and debugging.