[HelpDesk] Helpdesk question via web

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Form data:
  Name: George A. Pieraccini
  EMail: gpnyc at hotmail.com
  OS: XP
  UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8.1.7) Gecko/20070914 Firefox/2.0.0.7
  IP: 155.212.55.253
  Time: Thu Oct 11 15:16:55 2007

I'm looking for a particular dat file and I don't see it in the official or unofficial parts directories.  Its 45708.dat, the train buffer beam with plow.  I know it exists but I am unable to locate it anywhere.  Can you point me in the right direction?  Thanks so much.