Gas trolley to electric?

Has anybody ever heard of a gas trolley being converted to electric? What do you think it might involve? Would it be more practical and cost less money to buy a new trolley? I know this is a random question but I’m curious.

scratch the trolley bit. ICE bus to electric conversion?

Hi Evinstitute

There is more and more interest in converting vehicles to electric - not heard of an ICE bus conversion though.