I found them all online, but the sanyo website was only in Thai(I guess) and there was no mention of what kind of cooling unit the samsung ones used. The samsung site has a contact us section, have you tried calling or emailing?
The sanyo ones:
http://www.sanyo.co.th/coldchain/pro...llar/index.php
The samsungs:
http://www.samsung.com/ie/consumer/h...=specification
http://www.samsung.com/hk_en/consume...il&tab=support
Compressor type coolers can be made to work, but most prefer thermoelectric. If you can't get thermoelectric, ya gotta make do with what you can get. I don't have any real experience with wine coolers, so maybe someone else can give a better answer.
If you can't get a hold of anyone over there, I could call their N. American help lines and see if they know anything.