Obsolete Flash devices.

I have developed software for the RCM2210 style module using the SST39SF020A-45 flash. But this device is obsolete and SST are not making it. They have a 70nS device and are lokking into a 55nS in the future.
I have tried to run our code on this new device but there are issues. The resident remote bootloader does not work and the ethernet does not work over WAN.
What flash and ram devices are being used by Rabbit for the RCM2000 series in the future or even the 3000 series. Have the slower devices been proven? Or have alternatives been used instead? If there are alternatives, what are they?