Well, Newegg and Multiwave do not carry any Socket 7 mobos. That is usually the extent of my shopping, but you can go to
www.pricewatch.com and get socket 7 mobos there.
Package2you has two different Asus boards for sale and they are both under $50 shipped. You can find them here on pricewatch:
http://www.pricewatch.com/1/2/1323-1.htm
Their redellerratings ranking isn't horrible, but is worthy of some caution:
http://www.resellerratings.com/seller2249.html
Good luck
Dave
Also searching the motherboards part of the board for "K6-2" gives me two pages worth of Socket 7 mobos. Again I cannot stress the need to cross check the resellers at resellerrarings.com .