As far as vinyl go's you have many options. there are marine vinyls as low as 7.50 a yard. flat, textures, colors. carpet is not a good idea it will hold water and start to mold. and for replacing the wood there are many plastics to use also. pvc's, king star board, king star light all of witch are great for your boat. Making new coaming pads are the way to go for sure. 3/8 plastic 1/2 to 1" foam and foam back vinyls and i know just the place to take them to !!