I would be happy to accept frogs from you - they would be healthy as! Let me know if you do get froglets in the future and I'll set up a home.
Trouble with buying tadpoles is that they may not become what they are advertised as - I think L.aurea, L.raniformis, and L.ewingii all look very similar don't they?
I assume it would be the same collecting from a pond - if different species all spawn in same place...