Looking to buy 2013-2015 RS5 Convertible

Hello community! I'm looking to buy B8.5 RS5 Convertible (in US). Currently searching on usual platforms like FB marketplace, cars.com, cargurus, carvana. There are not that many options.

Could you please suggest forums or any other platforms where I could look? Any leads would be appreciated. Or if you are looking to sell - DM me.