In a pinch, I have made lids from foil. I think they sell lids
separately because sometimes the lid in a particular line of pots and
pans fits several items that they sell.

Also, it makes them more money.

I get my best cookware at second hand stores and yard sales. I have a
wonderful, heavy roasting rack that cost me a dollar. You can't get
one that good today even in the cooking stores.

Guinevere
http://www.writingup.com/blog/Guinevere
Or
http://www.writingup.com?referer=8486