just recieved our rather huge order for some repairs we need to do. initially we were going to try infusion so we didnt order any release film, but now feel we're better off sticking to wet lay and vac bag.

There are many videos on youtube etc. where people do vac bagging without release film.
If you think you really need it and can't wait for the release film make your own. Take a trash bag and put a bunch of holes in it with a nail or wire. If you need larger amounts of release film, put a bunch of thin nails through a thin wooden board in the desired pattern and push it onto the trash bag to perforate it. Simple, cheap and fast. The resin will not adhere to PE or PP or whatever material trashbags are made of.