Strange; the glass in our screen door also shattered on our 2004 Tropical T396. If I remember correctly I removed the bottom track ( might have been the top track its been a few years) I then made a template first out of cardboard then out of paneling that when lifted into the upper track would just clear the bottom ledge so I could get it back in the slot. Once I was satisfied with the template I took it to a glass shop and had them cut me a tempered piece of glass the same size and had it drilled for the knob. Installed glass,slid glass to open position, raised glass and installed lower track. I seem to remember it being a little loose so I slid strips of plastic under the track to make it tighter. It was still working fine when we sold the coach about two years later.
