Is there an easy way to run KS3.0 on A1000?

[Jope]

Build a 512k WOM and burn new early startup roms.

http://aminet.net/package/docs/hard/512kWOM

[Jope]

If somebody will build this, I will buy it. As long as it is switch able between 1.3 and 3.1

If that's all you want, then maybe look for a kickstart adapter that plugs into the 68k socket, then use a kickswitcher to switch between the two.