[Salar]

hayling trailors sell them,they are just over the bridge on hayling island.about £80

I had mine made by a local trailer shop, cost about the same, but mine were made strong enough to hold a fully laden Alaska in the Langstone Harbour cross-current. You need to check how they would stand up to actually holding the boat as some I have seen are just guide rods rather than a strong cradle to help retreival. If you can get them ready made you can see what you are getting, but if not it will be no problem for a trailer shop to make them for you.