Rubber sway bar bushings

Are these the triangular bushings?
If you find them, please post here. Poly are the only ones I've ever found. I take them apart to grease them every other year or so because of the squeak.
According to the parts manual for 1968, they weren't serviced. I guess if you needed a bushing, you had to replace the whole bar.

There’s no need to disassemble the mounts to grease the bushings. Next time you take apart the mounts, drill the mount for a zerk and drill through the poly bushing at that location through to the bar. The poly is stiff enough that the hole won’t bother a thing, and now you can grease the bushing any time it needs it.

Poly is not like rubber, it doesn’t flex much so the surfaces that move against each other need to be lubricated. If the poly is squeaking it needs to be lubricated, otherwise it will wear and deteriorate. Properly lubricated it’ll outlast rubber and provide better performance.