I always wondered what completely retarded government official decided that the USA would be better off sinking so much of our valuable resources into the ocean for no benefit whatsoever (other than mere target practice), rather than taking the raw materials the ship was made from and recycling them through our fully functional steel mills to make cars, tanks, planes, ect ....
There are several dozen salvage operations on east and west coast who would likely be able to obtain pieces of decking from these downed ships for you ... the cost would be pretty high, but you could offer to commission pens for them in exchange for a discount?
Perhaps, if enough people got together and functioned like a "group buy", the costs could be shared by the group.