Stickup Cam - Hardwire Options

Good evening. I have a Stickup Cam that I have been using with a battery for some time. We have recently had some re-wire work carried out and I took the opportunity to have an external 240V junction box installed, which is very close to the camera. I have seen the power adapter and transformer that can be purchased, however, I don't need the huge length of cable that comes with it. Although I could cut down the length that connects directly to the 240V supply I would still be left with several metres coming from the transfomer to the camera itself. Again, I could cut this down, but that would require another junction box to ensure waterproofing, plus I don't really want to spend £35 on a kit to throw away half the cable. Are there any other options available, similar to the one that comes with the Spotlight Cam mount, although I appreciate that is a different voltage. Thanks.