It occurred to me the other day (don't laugh... sometimes this does happen) that it would be useful to have those sticky roll number labels that professional labs use when they process film. You know the ones I mean, I'm certain... two stickers with identical numbers (usually four digits); one goes on the film and stays on through development, the other goes on the envelope in which the film was deposited. After processing, the numbers are matched up so the film goes to the correct owner.
Why would these be useful? Well, I tend to get quite behind in my processing and do huge batches at once. If I keep exposure records, I could put those labels on the film when I load it into the camera, and put the matching label on my notes for the roll. That way, I'd know what camera and lens I used for the film, and what exposure settings I used (if I recorded them).
I'm sure that these must be available somewhere. Does anybody know where a lowly amateur can acquire them? I'm in Canada, but ordering them from the US would be fine. I'd even get them from overseas if I didn't have a North American source.