When my dad bought a 51 Frazer standard parts car many years back, it had the plastic nose. After some research, there was a Service Bulletin sent out at one time to dealers to replace the plastic noses with the chrome steel nose. All cars in factory were changed out. The nose piece is different from that of a Kaiser. The design of the steel nose is the same as the plastic, just different material. I do not know of which service bulletin it is and maybe in the pile of literature "to be gone thru later".
It would not be too difficult to re manufacture the plastic noses and I have thought of it myself. But as an owner, I know how easy it is to grab the nose as an attachment point for shutting the hood and making sure it latches. I know I would still stay with the stronger steel nose myself.