Eastport Pram floatation

I'm not thrilled with the  plan's suggestion of epoxying foam to the bottom of the seats on the Eastport Pram.  I store my pram nested on the bow of my sailboat and putting foam on the seats is just going to make finding a place to store the seat while the pram is apart that much more difficult

Anyone have any alternatve suggestion for floatation for a nestng eastport pram?