Turbo Tumbler Wheel Connector

I made this part for my kids Turbo Tumbler remote controlled car. I believe its available at Walmart, Best buy, Amazon and Ebay. This is the part that connects the wheel to the axle. My kids were playing with the car and I believe my daughter pulled on the wheel and broke it.

The holes are a little small. I had to drill the screw side with a 3/32 bit and I heated the axle and put the other side on. I did not want to make them too big because I wanted a tight fit. If there is enough of a want