Hi Gavin
I have just had the same problem with my Abbey and bought a GRP one from the following http://www.lycoseshop.co.uk/epages/caravanpanels_com.sf/en_GB/?ObjectPath=/Shops/caravanpanels.com/Categories/parts19
I would warn you that I had all sorts of problems actually getting the part and ended up going to Preston ( from Cambridge)to pick it up. The part itself though is superb and cost
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