Eureka Aircraft:
http://www.eurekaaircraft.com/
Aztec Air:
http://aztecair.net/
Carolina Custom Aircraft: carolinaaircraft AT embarqmail.com (Dan has no site, email him for a brochure)
Bluejay Aircraft:
http://www.bridiairplanes.com/
Do some looking in the Classic Pattern Forum, there are a fair number of old time pattern ships still available. Many of the 60 sized ones would haul nicely with the ST90 and a Jett muffler.
Mark