it never rains here in AUS so I dont need watertproof
Well I think that Goolwa is offering big bucks to entice the BSAOC SA to hold another National Rally there.
I think they got around 8" on the National Weekend and it has not rained there since.
Campbell's Creek has rained on every ABR so far, actually come to think of it I can not remember an ABR that was dry.
As for the actual topic, the regulator & its mounting was a Lucas part .
You will find the grommets in the Lucas parts lists.