I have an old Spartan 1 piece riding suit. It looks like it is now sold as a Firstgear Thermo suit. I would like to be able to use it with my heated gear but how do I get a wire through the suit to plug in? Is some kind of glue on or sew on pocket/ pass through available that could be a water barrier? Are there any other recommendations? I can just think of stabbing a hole with a knife but it will create frayed material plus an air/ water leak.