On the Lazarette subject:
My lazarette bulkhead has a couple small holes related to plumbing and electrics. I was going to guess that's a previous owner's alteration to A-414. It probably helps lighten the stern a bit. Wouldn't be a good idea for the outboard folks.
On the "why don't we start production" subject:
With the exception of the Ensign, the 60's vintage pearson molds are gone (although a new mold could be pulled off a vintage hull). The Ensign is still in limited production by Ensign Spars.
there are other options for surviving molds for close cousins (Cape Dory relatives)...
CD25D & CD26 (Triangle Marine in R.I. owned by a current Pearson Triton Owner & Restoration guru)