I just checked the price... RCA180P is the Ryco part number ..$26.90 ea online "easyautoparts"; Karcraft (BTR8037) approx $15 ea for "copy" or $34 genuine (ea), British Parts UK $5 ea + postage; island 4x4 ...anywhere between A$7 and $19 ea for aftermarket, genuine: POA!

Bye the bye...This afternoon I ventured into Clarke Rubber and happened to see an open container of wiring grommets about 1/4"-1/2"diameter ...I registered "1.3" and thought maybe it's a misprint for 13 cents each (expensive) ...no, $1.30 each
I didn't need any...thankfully, not even for spares just in case

I suspect that there never was a moral code governing the marketplace, but outright profiteering seems to be quite acceptable these days.

end of rant...