I think it's super cool that you're doing something like that. I have an autistic nephew who is obsessed with money, so I'll happily help here and then make a few of my own and see if I can use them as well to turn him into a hockey fan.
Here's my version of a Ferland $20.
Edit to add this:
Really wanted to make it an 11 dollar bill, though.
Backlund $10
I'll do some more for you later today unless someone else jumps on it. And shame to anyone who makes the $5 with anyone but Gio