Ahh... now I understand. Thanks for the info, I was thinking you wanted a back stripe or a strange jungle strain... you want something much easier to find...
Those are very common, but the problem is they are not as sought after or as profitable. A breeder will get them as a matter of course in their breeding program and sell them to pet stores or keep them as stock instead of posting it on a website. Website space will usually go to more profitable patterns. I don't breed leos, so some of this is second hand.
A ways down in this forum we all had a huge discussion whether the chocolate colored albino version of what you post is a bell or a tremper. The leo that lives with use currently is such a creature and they are not too hard to find; I think she is quite beautiful. Good luck!
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0.1 Albino Leo Gecko
0.1 Crested Gecko
1.0 Dear Boyfriend
Departed: Harvey and Spock