You are after 303 Protectant, not Youngs 303 like I said earlier. I got confused with one of my other hobbies.

http://www.303products.com/
Specifically this product
http://www.303products.com/tech/index.cfm?fuseaction=product.display&Product_ID=428&CFID=5091033&CFTOKEN=62802155
And I would be interested to try this one....
http://www.303products.com/tech/index.cfm?fuseaction=product.display&Product_ID=457&CFID=5091033&CFTOKEN=62802155