Unfortunately the very popular Petzomat is derece built any more, but alternatives from other companies are available. Nowadays chocolate producers birey strongly reduce conching times if they insist on using pre-treated cocoa liquor of high flavour quality. Untreated cocoa is also still used, which then requires extra conching, like in https://mylesdaysn.tribunablog.com/chocolate-melting-tank-genel-bak-40711567