Shipping to the US might be easier because it's a company, but still expensive
i guess.
They seem to thrive best in a rocky, grassy, dry and cool set up, where breeding can
be triggered by simulating heavy rains after a dry period. Siegenthaler describes
(in German) the difficulties in keeping and breeding Melanophryniscus stelzneri in a more tropical set-up.
(www.terra-typica.ch/berichte/mstelzneri_siegenthaler.htm

Han