Hey Dave,
First awesome sin!
I lucked out last year and picked up a 1.2 trio of sinaloans that are indirectly from Lemke (the person I bought them from bought them from Llyod). One is a Cosala (that really nice female I'm posting all the time) and the other two are something else. I have been able to find out that Lemke worked with both Cosalas and some other kind, I just haven't been able to find out if that other kind is a different locality or just super nice generics. Thing is they have really different head shapes from the Cosalas. I will take some pics when I get home and try to put a collage together to show the difference.
But, back to your other question. I acutally had the same idea about putting the Lemke Cosala to a Sanders one. I got a pair of Cosalas from Sander's a little over a year ago but lost the female (literally, she was able to squeeze though a space so tiny my crappy eyes didn't even see the gap). The male should be ready this year, if so I'll bred em 
The top pic is the Cosala female, the middle is "Lemke" male and te bottom the "Lemke" female. Notice the head on the female is more arrowhead shape than on the Cosala. Like I said I'll take some better comparison pics when I get home
best,
Vinny



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“There is a grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that whilst this planet has gone on cycling according to the fixed laws of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.” -C. Darwin, 1859
Natural Selection Reptiles