I don't know about Innova's ability to buy "quality" plastic. I don't even know anything about plastic. I do know that 52.5 million in revenue is very very little compared to other lines of manufacturing.
The 1000th ranked company by Fortune made 1.8 Billion in revenue last year. Obviously no one expected a disc golf company to be on this list but you can see that apart from the top dawgs Walmart (500 Billion... :gross
the bottom of the list 900-1000 are much closer together. You could extrapolate that by the time you got down to 52.5 million there would be thousands of companies of a similar size, probably tens of thousands.
http://fortune.com/fortune500/list
Infinite discs posted a blog awhile back that said they sold 10 times as many discs in 2016 as they did when they first started. In that blog they posted a percentage of their sales by brand. It appears to be at least a fairly good gauge of market share.
https://infinitediscs.com/blog/disc-golf-sales-trends-by-brand/
They didn't post how many discs they sold or what the average price was. Can't blame them for that. Same reason the disc golf companies aren't posting their earnings online.
Speculate away!