Hey Adrian, nice buggy. To convert it to electric is possible but it would require you to be creative, adapt parts, make parts and probably drill a few holes here and there.
If you are determined to do it, you would probably be best to look at using parts from a 1.8th scale electric buggy and adapting the parts to fit. I could not give you any ideas on parts to use as you will probably be the first to do it! I doubt it will be cheap though, 550 motors are pretty costly as are the speedos and batteries. Good luck if you do go for it.