Hi JenRi, you are talking about one of my favorite species, the
Musa acuminata subsp sumatrana aka Zebrina aka Rojo aka Blood Banana.
Now if you have viable seeds, they are very easy to sprout. Please refer to the other germn thread for methods which I posted a reply to your inquiry.
All you need is an area of about 90+F constant or a a night drop to 80F. These guys will come up after 12 - 15 days. From then, growth is rapid and they put on the adult colors of red mottling on the upper leaf surface within 3 mths.
Besides Thailand, a good seed source is rarepalmseeds.com. They are a reliable source and my main source for sds. All the best!
These are new sprouts which are a couple of days old. They come up all green.
Pix shows germn box sprouts to sdlgs of various age. Biggest is about 3 months old with the red mottling starting to show.