I've long wanted a hockey game. They have pucks made for carpet that have internal fans and act as hover-craft, though I'm not sure if they'd be durable enough for our use.
I think you have to make two assumptions about that package.
1. The length is necessary, which means it's not flexible.
2. It's not a common item like a hockey puck, stick, or PVC. If it were, they'd have us buy it ourselves. Even things like the tetras can be made out of PVC. This is something a little more exotic.
https://www.google.com/shopping/prod...ed=0CFMQpiswAQ