PLEASE HELP! I believe the Leica part number I need is 17 011. I'm just setting up my new darkroom to print an exhibition at Film's Not Dead in London, scheduled for December, and the neg holder in the beautiful V35 I've bought is the standard 24x36 size. I must have the black borders, so I need the non-standard 17 011 neg holder. Name your price! Thank you in advance.