I think they release 1 Beat Ty Rich And Rare coloured coin per year through the RAM : ) or so it seems. There are three so far - just google it : )

World Heritage is lovely too. 

by the way, I read something about coloured coins not being as good an investment as the proofs because the colour covers the metal work and it’s still relatively new. So non coloured or proofs are probably the best way to go in general as you noted with your silver/bullion observation. I found that interesting and as always there is so much to learn. 

P.S. I finally landed the latest bluey colour coin at auction for a silly sum of money and will basically be eating cardboard for the next fortnight so I can stash that coin in my cupboard lol. 

Hope you are well @Mustang67  and @tyme