You could try putting a request in the wanted to buy for some "unwanted or extra plants", I am sure someone over there would be happy to help and if not there is nothing lost. I know it says 'to buy', but if you explain your situation I HAVE TO BELIEVE THAT THERE IS SOMEONE NEARER YOU WILLING TO HELP if all it costs them is the postage for some excess plants they don't want?????? WORTH A TRY, NOTHING LOST!
I am always discarding unwanted plants (usually just Java fern or Moss admittedly) so if you were in UK I would be more than pleased to donate/send some, but sending to US would be a bit too difficult/far unfortunately for me, plants etc ????
Good luck with it all!
Simon