It probably doesn’t take much to get people to throw in $10, and you might find some that will throw in $50 or more.
There are people who will scan it for you affordably, so you don’t have to buy or build a scanner.
How would you find them? Get creative. Write a blog, post on various forums, find collectors groups online and sound them out, see if there are film groups in your town, have a bake sale etc. etc. It takes a bit of perseverance work and dedication, and sometimes a bit of luck.