Thanks. These guys seem very peaceful compared to other knifefish I've kept. They will chase eachother out of their hiding spots, but it is always brief and I haven't seen any damage to fins at all. I put in a dozen white clouds from another tank when I got them about 2 months back and there's still 6-8 left.
I'm in Canada. I would suggest that you just go to your local fish store and ask them to order some, or contact a vendor in the buy and sell section here. A vendor who does a lot of South American orders should be able to help you. I believe that these are in season right now, as a supplier here in Canada just brought some in.
I'll try to post an update on these guys in the next week.