Why are most bumper medallions gone??

[Vanspeed]

I have one on my 29 coupe, thank god but every other model A I have bought has not had one - all 29's. Most pics I see of A's for sale do not have them. Why are they always missing? Why were they taken off in the first place? I would love to get one for my 29 CCPU but man, I cannot spend 200 on one and I would never run a reproduction. Is there a box of them stashed away in some junkyard somewhere??