If you can afford one, I'd still check out Continental and see what they have. They have the rep of providing the least amount of highway speed slip, with the max amount of flash stall. I'll refer to it as the best flash stall to cruise stall ratio, for low rpm cruisers.

For example: they might be able to build a converter for you with which you can cruise at 2200rpm, but which will flash to well above 3000rpm.

Might be worth checkin out. Let us know what you find out.