We used to import an Universal version of the SL1 for North America market, but it sold about as good as Creamsicles in Antarctica.... Currently the Universal UL1 verion is OEM for European distribution only.
BTW.... The SL1 also has a flat horizontal 90 degree surface on the bottom.
That's because you have it for the USA / Canada Market.
In Mexico, Central America, Caribbean and south america the standard is Universal Linear Ku.