Just curious, since I can't really give any good advice... I'd be pretty hesitant, myself... but why not get them, then sell the sub-Saharan to someone who's interested in breeding for the larger size, or who just wants to try their hand with a wild-caught? Is there a buying clause that you can't resell? If not, you could give her a good home - then send her to a home that was looking for something like that.