So I emailed the Riparium Supply website you gave me and have been chatting with a Devin. He said he happened to have a red mangrove that had three shooty-things on it and if I got the 3-pack and some gravel, he'd throw them in complimentary. Cool Dude. They're growing is slight brackish and I gotta acclimate them to full salt and I'm a bit intimidated about that... He said it would take 6 weeks or more! Oh and he also said that it was more important for mangrove roots to be left alone than root-bound and he's gotten mangroves quite large in the little cuppys. I guess we'll see what happens!
Anyway, I'm gonna place the order later today. So thanks a ton for pointing me over there!