110V to 230V plug ?

[DRJDVM's '69]

So I've been looking at the Thermal Dynamics 38 Plasma cutter and according to the specs you can run it on 230V or 110V. Obviously the cutting power will probably be better on the 230V input.

The unit comes with a 110V plug and the guy I emailed about it on ebay suggested that I make a short adapter so I dont have to cut the 110V plug off the cord.

I just had a nice 230V outlet wired up for my mig welder, so I was hoping to use that same outlet for the plasma.

So.... any suggestions about adapting the 110 plug to the 230 outlet ?