Um yes, I actually had the same though about that plant when I seen your friends and started to look up sellers for a full-sized Namwah. I er... haven't ever ordered anything from them. And... their advertising practices are questionable but... says these plants get to 20 ft. (and I didn't see the word dwarf anywhere) Sadly this was the only one advertised... but who knows with them... I've heard good things.... and I've heard bad things...
The Nursery at TyTy: Nam Wah