Just do a google search as I did with a sample below. Keep in mind that part is not easy to replace and you will need the service manual to do it. Google the service manual.
http://www.amazon.com/HP-2600-TRANSFER-ASSEMBLY-RM1-1885/dp/B000MYXE16
http://www.amazon.com/HP-2600-TRANSFER-ASSEMBLY-RM1-1885/dp/B000MYXE16