Looking for the collectables is driving me nuts.I need one in each and all that pops up are ones I already have.Any sugestions on how to get new ones to show?

You just need to be patient, they will show up eventually

I think it is the luck of the draw on that. The game generates them randomly.

some more than others. depending on how rare they are.

I do believe that about 45% of the time a common shows up, on 35% of the time an uncommon shows up. And about 20% chance of a rare to appear.

Charley has really mastered it