I never know if what I do is ok or not on forums lol...
Rare Wild Betta Fish | Blackwater Aquatics Those guys are in it for the FISH not the Hype or the Big Dollhairs... you can hit their site and chat with one of the 2 guys who are most involved. They are not a big company but they have a goal that even got my attention. I had always been anti-wild on betta keeping until I met one of these dudes in a game I was playing online one night. Fish people and Jesus people have one thing in common... eventually, we talk about our passion subject no matter what we're doin lol. Not, intended to imply any religious connotations it was just the best example I had.
After chatting with the younger of the partners for a couple of hours and heading to their website I discovered that these fish were exactly why I am still in the hobby like a nut case... Nearly every wild type Betta is in desperate need of those of us who are able to house and spawn them to do so. There are a few of them that are gone from the wild already, and nearly every wild betta species is RedListed and on the way to becoming extinct. They are breeding all of them in their own homes just like you and I are. They are 100% dedicated to Blackwater fishes.
They don't have any Albimarginata that I know of in-stock atm... but if you are really really wanting that certain species for sure then I would recommend spending a little time talking to them and let them know you goals short and long term if you plan or wish to expand on these guys. They will be able to give you an idea on incoming shipments they have and on their own young growing out so that you are able to stay on top of the site and catch them when they post them. Or in my case, since I can talk the rock off of granite, they tend to sell me their stock before posting or try to order the color I am after. My thing seems to be the Copper color variations... mind you, Copper is not found in the wild but it is still a pure species of the Smaragdina var. with the grey and green/blue metallics crossed for shade. Some still look down on them as being hybrids, but if you go to the site check out the Copper Smaragdinas they be da BOMB lol