Last time I checked, the TL gasket was only available for one side, the other side was NLA (not sure which one).  However, what are you folks doing to seal the lens to the bulb housing.  Can butyl rubber rope gasket (stretched thin evenly) be used.  I see the thinnest available is 1/8" X 1/4".  Any ideas appreciated.  Thx.

I would not use butyl. Gawd no. The stuff is worse than gorilla snot once it's gotten warm a few times. It's hard to get apart, stringy and messy. In high heat areas, it will ooze out over time. You could run a thin bead of Ultra Grey, level it out and let it dry. Permanent gasket. They also sell the same foam gasket material in sheets at craft stores. The missus has some. It's a little more dense, but doable and I've used it for other projects.

Thanks for the F/B.  I will try and look up the foam material at the craft stores.