While looking for some DC-Fix in the UK I came across a site selling sample sheets of it for 30p each. They have the original “Milky” and the thinner, less diffusing “Frost” available as well. Shipping was only £1.20 as well.
https://www.createyourworld.co.uk/product/window-films-peel-stick-sample-milky/
I’m not sure where I should post this but it seems like a steal!