I have a 2000 Magna #5854 with a Cat C10 engine. The heating unit in the base of the fuel/water separator filter has failed. Has anyone replaced this fuel heating unit? I have called both Caterpiller (with engine serial number) and Winebago/Country Coach in Junction City, OR. Caterpillar was unable to help me and Winebago has not gotten back to me. I have attached...