So I am a 3 rail guy, toy train, type of guy, with a two rail question. I am looking for some axle sets to build a project car for three rail but I intent to start from the ground up. Can someone tell me where to find wheel/axle sets that have solid end axles instead of the needle point design used in most 3 rail offerings?
Unless I'm reading your question wrong, it seems that pretty much any postwar or pre MPC wheelset will serve your needs...
Unless I'm mistaken, Lego trains run on plastic rails, so short circuits aren't an issue.
Hope this helps!