It can be tough trying to transition to skirts and dresses in the winter. As you probably saw from Angie's recent thread, retailers seem to skimp on warm dresses at this time of year, grr.
The only advice I can offer is that if you want corduroy, you could try Free People. They have a lot of corduroy items. I have a corduroy skirt from there. It is actually a miniskirt (not sure if that suits your fancy), and I wear it with sweater tights from Nordstrom. That's my rec: sweater tights with your skirts and dresses. Soooo cozy.