I am in the process of installing my SB 3250 DD clutch and I just dropped the transfer case off the back. When I got it down, I noticed the dust boot on the rear output is torn. (Might have done it when I pulled the drive shaft.) This is not the seal but the boot that extends over and covers the end of the driveshaft that enters the case. I am surprised how thin it is but it is also a little brittle after 225K. It is a NV273 D off a 2004 NV5600 truck

Anybody got a part number for this thing and someplace to get one? Thanks for any help!