Now here is an interesting idea: If you have an Oneida dust collector, and add the wireless remote receiver to it, they wire in the receiver before it ships and it is inside the on/off switch power control box. That means that there must be a low DC voltage somewhere in there to power that tiny receiver. Unless its built into the tiny receiver box they install in there, though I doubt that. Id have to go messing around in there to figure out how much voltage and current is available from the power supply they are feeding that RF receiver with, but yea it might be possible to power the bin sensor system from that...
If at first you don't succeed, redefine success!