I think the best option is to ream out the headtube to 30.2 so it does fit an ISO standard headset. I spoke to two bike shops in town; the mechanics had no idea what I was talking about and don't, in any case, own the proper tools. I just looked on Park's website, the tools are there but I'm sure as heck not buying cutting tools for a one time job. I think the knowledge to do this kind of work is just sort of disappearing.

I think it's a really nice bike as it is a custom very old school vintage touring bike with pretty lug work, investment BB and fork crown, campy drop outs, etc., so it is worth my time to do this right.