The page linked to from Macodirect for the Redscale example carries this message:

(This WAS NOT taken with Rollei Redbird, despite what some German website might be telling you to sell this particular brand. It was taken with some 400 film that I redscaled myself. I repeat: NOT Rollei Redbird, buy your own cheap c41 film and redscale it yourself. There's no need to pay 5 euros per roll!)