Hmm. I can't offer any suggestions, except to say that I can't imagine that there would be too many in that size range.

A lot of manufacturers have standardized on universal circuit boards, so most won't have a 50/60hz refresh problem (ie. I recently discovered my US-spec Pioneer Kuro is perfectly happy to display 50hz), but the integrated power supply is usually the one place where there's still regional differences.

Again, sorry I can't help with suggestions.