We got our Vinyl coated cushions for C Cushions in Rockport, TX.
http://www.ccushions.com/marine.htmHe has a template for the Tartan cockpit. We added in the drink holders in the forward portion of the side cushions and both sides of the stern cushion. The stern cushion has the helmsman hump which IIRC is 3 layers higher.
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Sailing w new screens.jpg [ 180.68 KB | Viewed 0 times ] This picture was taken before we had the drink holes installed but you can see how much higher I am sitting. We also bought two small cushions for the dinghy with a small hole in one corner so we could tie them down to the dinghy.
But they always ended up tied to the stern rail so someone could sit in the corner of the cockpit. And several times they ended up dangling off the boat by their cords.