Originally Posted by JunkYardBike
A few frames have come along in my size, but they are either very expensive (near the cost of a brand new frame) or they have problems, such as cantilever bosses for 27" rims or narrow chainstay clearance.
That's not a "problem".
Any purpose built touring frame will have enough clearance. Well, maybe not if you're running 45c tires or something ridiculous.