Anne G
Nathan,
Give these folks a call. They make those rollers for Saris and likely would have the part for less $$.
Anne
http://www.sportcrafters.com/welcometop.htm
Pete Colan
SportCrafters
PO Box 452
Granger, IN 46530
E-mail: Petercolan@aol.com
Phone: (574) 679-4057