The more the merrier with the game jam! I have posted some instructions (link below) to a pdf print service where I get my personal copies printed as an option for people to get them printed at cost. Others have used lulu as another option.
Please note that this is a third party printing service I have used, I am in no way affiliated with them and not making any money off copies printed by them (just to be clear).
https://itch.io/t/2421172/printing-instructions-using-online-service