I can put together some T shirt - Sweat shirts - Hooded tops - Caps etc with the Ribnet logo (if thats ok JK) or any other designs.
I don't see any reason why the cost couldn't include a contribution to Ribnet. JK if your ok with this let me know.
You can look at some examples at www.justski.org.uk
The only limitation is that the garment has to be a light colour or the design has to have a white background - you can also have your boat name or web site etc down the arm or accross the back or anywhere you want.