Here's a couple. Would these work??? http://www.morris4x4center.com/37-tooth-long-speedometer-gear-white-52068159.html

http://www.ebay.com/itm/Dodge-Jeep-37-Tooth-Speedometer-Gear-Long-Shaft-with-Oring-and-stem-seal-/161722538260?hash=item25a76a1914:g:DD8AAOxy3HJTHfWC&vxp=mtr

BTW- Happy Birthday RapidRobert. Hope it's a good one!