Our team has a 2 hole Alvah Boomerang box where one of the ball thrusters has stopped working correctly. It would seem a shame to have to spend over £300 on a new Box, just because the thruster wasn't working. However, I can't seem to find anyone who sells these separately. Any ideas?

They do service boxes they make or will send out spare parts if you want to do it yourself just email them and ask. We have one of there boxes and have had no end of problems with it so your not the only one.