Although Intel macs don’t support classic, SheepShaver may be a way to run older software. I’ve installed an x86 build and I finally found a working ROM image, but it won’t boot my 9.2 CD, which is the oldest one I can find. Tomorrow I’ll look for a 9.0 CD which it should be able to boot.
UPDATE: I was able to get it running using the Software Install CD from my old G4 minitower. I posted the full details here.