The PL Ametyst is available from Ewa Michalak in various sizes (with special ordering up to an L cup I believe) for about $43.00 After much urging from my reviews of the PL Stalowka and PL Karmelki...
http://fussybusty.com/2013/02/26/plus-size-bra-review-ewa-michalak-pl-ametyst/