6.5x9 is mine, I have a real nice little Ihagee kit but it rarely gets any use and when it does get any use its with a 120 adapter.
Have you tried stainless steel hangers for 2x3 processing? I use them with regular 4x5 tanks and am happy with the results. In fact I like using the baby press camera's so much that I've been thinking about trying my hand at cutting down and processing color film