Got them off Amazon. Had issues binding but figured out the pinion gear needed o rings

JVSISM Metal Front & Rear Axle Complete Axles for Axial SCX24 90081 AXI00001 1/24 RC Crawler Car Upgrade Parts Accessories,1 https://www.amazon.com/dp/B092SBJG4C/ref=cm_sw_r_cp_api_i_F24RZVR6VRDRJ7WTKB5H?_encoding=UTF8&psc=1