I too have had to resort to wearing men's cycling clothes because of my size. I do also have some plus sized women's cycling wear, but I find that you really have to be careful because different manufacturers have different ideas about what "plus" size means.

I have some mt Borah baggie shorts that I ordered from te that I wear a lot, but the Mr Borah shirt in the same size is too dang small. The baggie shorts don't seem to work as well on the road bike as they did on the hybrid, either; They're always getting tangled up in the nose of my seat .

Junonia.com has a good selection of cycling shorts and tights in very generous sizes. I don't care much for their tops, though. I have a 2x commuter jacket that could wrap around me twice. I'm sure I must look like a circus tent come to life when I wear it

My most comfortable outfit is: 1x women's tights or shorts from Junonia and 3x men's performance jerseys which are long enough to cover butt and belly. This combination seems to earn me the fewest open mouthed stares