Check with Tiny Motors, he does repop tires for Strom, Eldon, Revell etc. He also does Strom and Eldon replacement body parts and some cool repop bodies. http://www.tinymotors.net/
E.J.'s Hobbies all so make tires that will fit them pt.# EJS16 GP tires. There real soft rubber, not silicone. The more you use them the better they grip. They measure 13/16 Dia. X 5/16 wide. Here is his link. http://www.ejshobbies.com/index.htm
I have one of these motors w/pinion, no wires. It measures 1.4". I've also seen a Revell chassis like this one that has a similar can but it measures a bit shorter. If your chassis needs the 1.4" motor message me.