I have a project that has a need for joining .012 wire in a "T". some time back there were plastic pipe joints but I can't remember who made them. MY LHS thinks it was Utah Pacific but there's nothing on their web site. Same for Plasti-Struct and Evergreen. Precision make a brass "T" cored for .015 but that may be a sloppy fit.This is a locomotive (SD9) project and some brake piping details on freight cars... Any help on where to find them will be appreciated.