Hop straining apparatus...PVC pipe?

Seen some rigs on here with a PVC pipe and threaded strut to hold it above the kettle. This seems much better than putting hops right in the boil and dealing with the excess hop residue.

Basically what I cant find is a hop bag that is longer rather than wider. Or if you make your own what do you use? I have a keggle but the big bag i used for my BIAB wouldnt even be long enough to reach into the wort when making a 5 gallon batch. would like to get more usable wort out of the keggle and not deal with hops so this seems like the way to go. thanks for the help and input as always!

I think they use paint strainer bags.

Buy a nylon paint strainer, they're usually long enough. Mine is a few inches from the bottom.

https://www.homebrewtalk.com/f11/hop-strainer-34303/

5 gal. paint strainer bag works great.
Just made one and cant believe how easy and better it is.