Could this be where it was purchased?
http://www.fatbraintoys.com/toy_comp...own_plants.cfm
I suppose it could be nagensium, but that would be really spectacular as it is kind of rare in cultivation. Balbisiana is also a possibility. Do you remember what the seeds looked like?
Here is a discussion going on about musa nagensium seeds on this forum.
Musa nagensium seeds for reference
BTW, warmest welcomes to the forum!
Erlend