mind (such as it is) wonders if they are guppy/Endler's crosses which are unfortunately cooomercially useful as feeders. (I too have dumped the prodgeny of an unfortunate mix in a dealer's feeder tank.)
Probably you could Google search a lot more than I have but take a look at:
http://www.aquariumhobbyist.com/endlerslivebearer/page2a.htm
note the cross with neon guppies on the last frame
http://www.aquariacentral.com/forums/showthread.php?t=37181
Take up Scott Lockwood's offer. Or if you are passing through the Southern Chicagoland suburbs, stop off here. Express mail is probably cheaper from SL's . ;)
All the best!
unc;e
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