SOLA or other regulating transformer, 500-750VA, output 208-240

[Opcom]

Looking for a ferroresonant / constant voltage transformer or other AC regulator.
Input 190-250V.
Output any of 208, 220, 230, 240, or 250VAC
Power handling 500VA (watts) minimum, but a 1KVA may be too large for the space. Actual load is 390W.`

Ugly and cheap is a plus because shipping is a beast on this kind of thing Don't care about cosmetics, cords, outlets, switches, or casing type as long as it can be bolted in place by some means. It will be directly wired into the equipment inside a cabinet. Bad cap OK as long as the transformer is good.

I'm willing to pick up any offered unit within 1 day 'road trip' from Dallas Texas.

Thank you!

PS I like to trade if there is something you want.