http://www.seahorsesource.com/zosterae.html
^If you get them, get them from there without a doubt. This place knows seahorses and they are highly recommended by SH keepers. I know someone that got a pair if erectus from them and they helped him all the way through the QT process over the phone.
Are you prepared to feed live foods. They a lot and often.
I could do that. Anything over 2 feedings daily may cause some trouble with my schedule, so I'll have to keep researching.