To almost quote what BCR said, you would have to be like best friend status with a breeder for most to even consider doing a breeding loan. There are just way to many issues that can arise with this, especially when it comes time to "split the clutch".
In my opinion, I would think about breeding the bumblebee and cinny together. It gives you a chance to make a pewter bee (http://www.worldofballpythons.com/morphs/pewter-bee/)