My answer would be strictly an opinion so ill keep my yap shut but welcome aboard .
Unfortunately BRP thought it would be brilliant to make it not threaded....Is the union block not threaded?
If yes why not just replace the bad section?
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I used HEL performance here in Canada. They have divisions all over the world and are great to deal withWelcome to the site
Unfortunately, that assembly is only available as an assembly. Quite a PITA to have to change the entire thing when just one leg gets damaged.
There are companies out there that will make you a "serviceable" 3-way, but you're still buying the entire thing at first, to get the serviceability down the road. May or may not make sense for your use. Search the site here, think the highly reviewed company I'm thinking of, is up in Canada with you. @zrock was that you that was a customer of theirs?