273 & 318 single piston ring availability
I'm sure it's an anomaly, but jezzzzus... What a PITA!
So yeah, if you ever break a piston ring on a 318 rebuild, go straight to Hastings.
Knowing that most manus have them made by Hastings, at this point, I'm just going to go straight to them for all of my rings, regardless.
I ended up getting them from a retail supplier, who got them from the manufacturer, who was the supplier to the supplier to the original retail supplier I bought the set from. Um... yeah.
It's silly how many actual parts manufacturers there really are left!