I have a Hymer Exsis i and it has the removable bonnet. Two rubber tipped pins locate in deep bling grommets. One is missing. I am trying to find a replacement. Any ideas? I have been on to Brownhills but they say get in touch with Fiat. But this is peculiar to A class vans and not the standard Fiat cab. I can find loads of places that sell 'blind grommets' but they are all flat ones. Suggestions please