Definitely. It would help if you looked at another Wavesport or Dagger boat so you could copy the funny shape that their foam is in and see how it's oriented on the bulkhead. You could try going to a kayak shop and see if they'll give you some freebees, but what I found is kayak shops tend to mark the foam they sell up to obscene levels. I ordered a giant sheet of foam from these guys:
Welcome to Foam Factory, Inc.
I got a 3/4" minicel foam sheet that's 48x48. It was like 35 bucks or something, but now I never have to go groveling for foam again. I cut out a bunch of these using a template, made swiss cheese out of one of them for the middle layer, in order for it to compress in the event of a piton, and stacked several them onto my bulk head and glued them down.