[CraigB in FL]

I opted to try to repair rather than replace the valve body. I glued the collar back onto the body, then covered it with gorilla tape to make sure it stayed in place.

Being tired of the T handle pulling at odd angles, I built a guide tube to keep it in line with the gate valve shaft. I took a piece of 3/4" pvc, about 7-8" long, but short enough that the T-handle shaft extended past it. I notched the end of the pvc pipe to fit over the gate valve body. Using a neoprene washer, with an inside diameter large enough for the T-handle shaft. I taped it in the other end of the pvc pipe to keep the T-handle centered. Sliding the T-handle through the washer and pvc pipe, I then screwed it onto the gate valve shaft and slid the pipe onto the gate valve body. I zip-tied the pvc pipe to the (hydraulic?) pipe running under the chasis to keep everything in line and snug.