looking for fender tag and build sheet for 73 dart sport #3b428612

i just bought a 1973 dart 340 sport,good pa title and vin tag but missing the fender tag and build sheet.vin number is lm29h3b428612.car was bought in pa,previous owner was in ny.not sure where the car came from before that. i know it's a longshot but would like to locate either one.thanks in advance skip