IIRC when I bought 2xAR badges for a 33 and a boot badge assembly for a 146 the total was just under £50. The 146 boot one was about £20 and the ordinary badges were just over £10.
They took three at once off mine - the only one left on was the front of the 146.
I've had mine taken twice now, First time I replaced them with new ones approx £50 the pair then about 6 months later they went again! Replaced them with secondhand ones for about £20 and they were as good as new. I always keep an eye out for the badges in breakers at shows etc now.
Have also resorted to driving round with blacktape over badges for everyday use.