You'd think they'd be available with rubber track by now. The Canadian Army rebuilt and purchased some newer customized versions of the old M-113 with electronically turbocharged 6V53's and in some cases 'stretched' the chassis to make them longer and put rubber tracks made by a Canadian company called Camoplast to replace the old metal track that they normally used. http://www.casr.ca/101-army-engineer-mtve.htm http
Discuss this in the forum topic Here's a bit of history-still happening-FMC/KMC.