okay....this is going to confuse alot of people if i don't get it all straight now.
there are several main profiles tallest to shortest:
SA
OEM
CHERRY
DCS
DSA
they're all distinct from each other. although cherry and dcs are very similiar. so much so that people like to use them as synonyms. that is completely the wrong thing to do though.
cherry and oem are not the same thing either.
alos, leopold has it's own profile from what i'm told, but someone else will have to confirm or deny.
you're going to want to look for the ducky 'premier' series to get thick OEM pbt. be careful though, ducky also has a line of thin OEM pbt keycaps as well. basically, if the keyset has one tone (letters and mods have the same color), then it is thin. if it has two tones, then it is thick.
to get thick cherry pbt, you're going to want imsto. geekkeys generally has imsto pbt and imsto himself has a vendor forum here.