I posed this question to David Barker a while back and his reply was (paraphrased) that hobbyists should focus on the "domestication" of our reptiles and not appear to be working with "wild" ones. I don't entirely agree, but I think it's an opinion that merits serious consideration.
Another reason why the more well known breeders don't work with really rare stuff is that the really rare stuff isn't as commercially viable. I'm not at all saying they're greedy. They just need to make a living and they're doing it selling stuff people want.
I'm with you on where the hobby is more interesting. I'd take a healthy Boelens, Papuan or Western Olive Python over almost ANY morph, albino or whatever. But working with the rarer species is much more risky if you NEED to make a living from it.
So many advances have been made in the hobby/herpetoculture. It won't be long before someone unlocks the secrets to reliable breeding of some of the rarities. Do some searches on Kingsnake.com and on the web in general and you'll find a few dedicated folks working with all the species you named.
Good luck...
Doug T
---Why the hell arent the barkers and clarks producing weirder animals? Of all the things...albino retic. Big deal.
Youd think those dudes (especially barkers) would be specifically working with Papauns, Moluccans, Boelens, Timors, or any other extremely difficult to breed python(s). Why am I always seeing the latest morph? I would KILL (literally KILL) to be able to buy a baby boelen, or a baby timor. That would be tons more exciting than the latest morph craze. Damn