ck with hooch on this site - very knowledgeable guy when comes to stuff like that - i'll let you know if i come across something - i'm picky on tires too
edit - here is an ebay link:
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 602_263622
some 24s that u might like - kendas and chengs here
http://www.biketiresdirect.com/product/ ... -street-24
many more choices here:
http://www.everybicycletire.com/Shopping/c-17-24.aspx
good luck