<<<I've been trying to locate Allison Ignition to get a system for my Westy.
Anybody know if they're still out there doing business?>>

Crane Cams bought them out years ago.

http://www.cranecams.com/ignition1/electoc.htm

FireBall Points-Conversion Ignitions are the drop in points replacements.

I had one on my Bug and 73 Bus (I still have the coil 10 years old and still working...)

Robert