Good luck. My most successful search was "vintage greyhound bus front badge"
I found one that was on Pinterest (
https://www.pinterest.com/pin/361625045075920426/) and at one time had been for sale. Another was on some site that showed is as having been for sale on ebay at some point in the past.
It wouldn't surprise me if you could find one of those no longer surviving buses somewhere with the badge still attached.
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Steve
'08 Boxster RS60 Spyder #0099/1960
- never named a car before, but this is Charlotte.
'88 targa
SOLD 2004 - gone but not forgotten