Yes, 80/20 has some excellent linear slide concepts.
The three sided bearings are pricey, but the flat plate slides are more affordable.
This hard to find item is very,very useful for the 1" size framing. (Fastenal Part# 0961342 -- 80/20 Part#25-6797)
It can help stabilize adjacent sliding framing.
We used it with our FTC Kiwi bot elevator this year.
You can see it sticking out of the right rear elevator column where two 6-32 screws hold it in place. With only two stages to elevate 27" we had to go with minimum overlap of stage columns (<3"), requiring slide plates be <2" engagement.
This gave too much wobble on full extension, but this little piece solved our problem so well that we even got gravity return to work reliably.
NOTE: PICs are from when we only elevated to 16" so side plates not fully spread.
-Dick Ledford