Here are the website URLs for the radio. stations
I am trying to ascertain their stream URL’s from them but given that you al are Roon, you might have better luck.
From their website in the UK
Amazing Radio is a brilliant and unique platform for emerging artists. We are the world’s only digital radio station that plays 100% brand-new music from independent artists.
Our platform for artists is the future.
From their website in the US
Amazing America is a US-based music business 100% focused on helping new and emerging musicians. It operates Amazing Radio and CMJ , which together have more than fifty years’ experience of helping the world’s best new musicians get the break they deserve