did you mean Syngonanthus sp. 'Belem'? i got plenty in my tank, and i know a few people sell it too. you don't really need excel if you have pressurized CO2. you don't need a lot WPG to grow it either, i grow them in <1wpg. i have 2x32w of T8 over my 72G.
assuming this is the one you're talking about