The 'half moon' is not a specific cultivar. It is just a plant that has a specific variegation pattern in its genetic makeup that allows it to put out a lot of half and half leaves. And these can be quite variable and sometimes disappear altogether.
Personally I would not waste my money.
And no, I don't know a source, I don't buy plants from eBay or ETSY or import from Asia. I buy from and trade with other collectors.
