Welcome new guy.
I think it's going to be tough finding that part.
I doubt anyone would sell this Pilot part unless they converted their machine to rotax. But all is not lost.
Did it break off flush or did the nipple just fall out ??
Is it pot metal or aluminum ??
If the nipple fell out you could JB Weld it back in. Don't laugh, my formula race car had a rotary
Engine in it and the intake tubes were JB Welded into the Engine housing. Everyone did this unless they bought factory peripheral port housings -- at HUGE cost. It worked well, no issues ever.
If this is not an option because it broke off flush is it possible to drill and tap ?? Make a new nipple with threads.
Not sure what your mechanical skill set is but that's what I would do.
Edit: If there is still a piece sticking out then you could take a piece of break line that fits over it and JB weld it on. Flare the other end of the brake line first.
Hope this helps out.