There are loads of glands that would do the trick, the problem you'll have is that they'll stick out a long way. RS do a 90 degree plated brass gland - so you might be able to get them from a wholesalers for more reasonable money (RS want about £72 for 5!). The other problem is that that have a very small lip that normally fits against whatever they're fitted in, so you'll need a larger washer or similar to stop it just pulling straight out of the suit. Is it a permanent fitting, or is it going to be taken on and off? Another option could be to bastardise an old pee valve and just stick a cable through and glue it up well with araldite or similar.
Stan.
Stan.