I’m sorry to have to post a second article here. It seems that the first one didn’t get properly sent. We’re having massive web server/hosting problems right at the same time we planned to post our news about the new batch.
WS Flash Masta is here: https://www.flashmasta.com/product/ws-flash-masta-usb-cartridge-for-wonderswan/
I hope this post gets properly sent, and I apologize for any problems or double notifications.