Check craigslist for any Miller 135/140 or the Lincoln SP135+ (not the "T")
Both are infinite voltage adjustment.
If you can, step up to a 175/180 class machine I'd suggest you do it.
I wouldn't trade my MIller 175 for a dozen miller/lincoln 110 volt machines, well yeah I would. I'd sell them all for 250/ea and buy a nice 250 class or a Tig 250.