Found this site www.uwleakdetector.com for some tips and a detector you can but to fit to stills and video housings.
Based in Oz though so dont know if they ship os.
I bought and installed one of these in a Ikelite D300 housing about a year ago - snug fit, bit it worked out great. No problems with shipping to Europe anyway ! I'm sure they do worldwide shipping.
- the_dragon_no1 likes this