Send a message to dpendzic and JasonPayneCrawlers who are both out on LI and might have some info for you, including scrap yards and "abandoned" machines. By the way, Erik Christenbury has a serial number registry on the Chapter 12 site http://www.chriscomachinery.com/ACMOChapter12.htm (I hope that's ok Erik). Scroll down to Archive Information: and then Serial Number Registry and then by tractor model. I checked for this number and it's not listed so it's not currently known to the group.
Go to Craigslist Long Island--under heavy machinery post Cat D7-17A2851--want to buy
then tell your story--many many heavy eqipement buffs browse thru those postings like I do!!
I did that for my first Cat R2-6J102 but got no hits back
Call surrounding Cat dealers, they can check if anyone has ordered parts for it if they gave the serial number. Could have been parted out or scrapped. There were two local machines I knew of that got scrapped because the owners were greedy and wanted a high price for them. One was a 3T with engine stuck but would have made an excellent parts tractor had very low hours, the other was a D9D with Hyster towing winch and cable straight blade in good condition, I am still sickened that they scrapped it!!!
That would be H.O.Penn Machinery---Holtsville NY 631-758-7500