Hiya Tom.
I use 3D Cad for a living.
I couldn't find anything suitable for my Warrior, so I designed my own.
I had them built by my Ex - boss Tony O'Callaghan ( Club member cullodon ) here:
Email: solutions@robton.co.uk
Robton Engineering LLP
28 Balena Close
Creekmoor Ind. Estate
Poole
Dorset
BH17 7EB
Tel: 01202 695480
Fax: 01202 658899
We were so pleased with the result that we started selling them.
Tony has a Raider 18 moored at Christchurch.
I know he's in France until the weekend, but you could give his Son and business partner Steve a call if you wish
Hope this helps.
Jim