Try these sites:

http://www.cranklength.info/cranks.htm

http://www.cptips.com/crnklth.htm

http://www.cranklength.info/
http://www.nettally.com/palmk/crankset.html
http://www.zinncycles.com/cranks.aspx
http://www.billbostoncycles.com/crank_length.htm