Matt,
Not that I ever found. What I do is go to ebay.com and type in the player's name. Lots of football cards up on that site. You'd be amazed at who you will find there for numbers and skin tone. I just went through the 62 Texans file and updated alot of the jersey numbers and a few skin tones.
The Pro Football Encyclopedia (Out of print) does have jersey numbers fopr all Superbowl teams from 1966-1985 (when book was printed). That helps a bit.
But there is no overall site that details numbers that I am aware of...if someone knows of one, I'd love to see it. There was one site that is now archived that had made an effort to do this for the rosters, but I don't have the bookmark anymore. Alot of the numbers were incorrect or missing anyway on teams before 1975 or so. I'll see if I can find the URL again.
C