import re
s = "US Central Operations | 0054 '0054','0008',or '0009' to be a match, but i would want '10354' or '10032', or '9005', or '9000'"
print(re.findall(r'(?<!\d)[1-9]\d{3,4}(?!\d)', s))
aW1wb3J0IHJlCnMgPSAiVVMgQ2VudHJhbCBPcGVyYXRpb25zIHwgMDA1NCAnMDA1NCcsJzAwMDgnLG9yICcwMDA5JyB0byBiZSBhIG1hdGNoLCBidXQgaSB3b3VsZCB3YW50ICcxMDM1NCcgb3IgJzEwMDMyJywgb3IgJzkwMDUnLCBvciAnOTAwMCciCnByaW50KHJlLmZpbmRhbGwocicoPzwhXGQpWzEtOV1cZHszLDR9KD8hXGQpJywgcykpCg==