Somewhat adrift of the stern here, but it is the case that MSA UK properly has the right to invoke short notice for safety matters and of course needs-be they genuflect or react to FIA impositions as 'we' cannot be out of step - see GR A.2.5.2.

I think Lifeline in Cov' (whom we also use) charge about £40 net.

I would only add to what has gone before to say that don't forget to routinely pre-event check the pull handles and cables as I had the embarrassment at scrut' of a shiny car inside and out but the 1 season old cable simply pulling apart being completely corroded in the sheath which despite being lubed in situ' simply rotted away after a wet race (so there is a memo-to-self there on the prep' front to remove the cable and dry it out and re-lube after a wet race).