Someone asked about this awhile back but never got any answers, so I thought I'd try again. Does anyone have a 5x12 holder they could measure and give me the dimensions of? I'm just looking for outside measurements without darkslide, dont need 'T' or rib or even thickness, just width x length. Also, if anyone has any 'die-cut' factory 5x12 film the measurements for that would be great as well. Thanks very much for any help.