Dave, I'll check what's fitted to mine and have a look.
You stand a good chance of being in luck as I have just today throw two buckets of unions into the van to weigh in tomorrow.
Quite a few are new, probably a bucket full but got that much crap I have got to have a clear out.

What size pipe did you want to use as If they are what i think then you get a choice of 4mm pipe, 5mm, 6mm, 8mm and maybe 10mm