Yes ... there was C-Hubs for TL-01 with some 2 degree of caster, I still have it. It was made by TAMIYA p/n 53226 ... actually it's for TA-02 .. Unfortunately it's discontinued... you might try on ebay or somewhere else....
Hi, can you use #53226 on M03M. I think i have to change knuckles too, right?
Also, can you reverse C-hubs to get positive or negative caster?