I want to try some 1.0 mm / .040" wire for higher currents, so I need to buy a new feed roller for my 180EN. (The one that came with the welder is only for 0.6 and 0.8 mm.) Does anyone know where I can get this in the US? I tried emailing the Clarke office here about another part but it's been over three weeks and no response. I already have some 1 mm tips...