Try the Nashbar catalog that is on-line. Also, Team Estrogen has a link for clothing.

It is important that the layer closest to your skin be able to wick moisture. I bought an undergarment made by DeFeet that is really good.

Depending on where you live, you might also invest in warm cycling socks. If my toes are cold, I'm miserable.

You'll find that once you get out there & get moving, you'll warm up quickly. Good luck!