I found these at Stine in the plumbing section. For $3.95 each, they’re only a little bigger than the elbows most folks are using for the HGA Red Wire, Cyclotron Red Wire, and side mounted Red/Blue injector tubes.
I wound up using just one instead of all four for lack of time, but eventually I’ll have 4 of these guys cut and painted grey and in place around the pack to replace the copper elbows I’m currently using.
G