First, i know this place is mostly for video game design. But i don't see many other places for game design beyond video games, and i have no idea where else to go for guidance with designing a sport.
I had an idea today for a new variety of bowling that i think would be best played with duckpin balls and pins. Problem is, those are apparently really expensive. A quick look online has a single ball going for $60-$80 US, and candlepin balls aren't better.
Less recently i wrote rules for another sport that would require mostly original equipment, and i don't even know where to start with getting totally custom equipment made. I guess talk to a smith or welder?
If anyone here has experience with this sort of thing, how do you get equipment for experimental games/sports without spending hundreds or thousands of dollars on it? Is this why apparently nobody makes new sports?
Have you tried stacking up foam and carving it to make the shapes you want? Might be a cheaper alternative than paying for custom parts when you aren't absolutely sure of their design yet.
Adding on to that thought- You can also try something similar with cardboard. Layer glue and cardboard to get to size and then carve it down as needed. It's pretty solid and can hold quite a bit of weight.