Hey hey...
The ones at the local plumbing supply house always work for me....not sure of the name brand. Here is an example of the most common one used with a compression valve.
It can be secured to the wall with a dab of adhesive caulking on the back side.
Last note here, by the way...
just for future posters. The extended shutoff with bell flange can actually be
cut down and then installed.
Typically, I will measure so the shutoff ends up at about 3.5" to center from the finished wall. I remember to deduct for the 1/2" to 3/4" that I need to keep the shutoff away from the wall and cut that measure.
Then I use the
reaming tool on the
copper tubing cutter to ream the end so that it is slightly flared (YUP!! There's actually a use for that thing on the tool...

see image). The cut/reamed end needs to be cleaned very well using the sandcloth and the 1/2" cleaning brush. Flux, solder, etc.....
If after cutting you don't round/flare the shutoff end you will never install it!!
Again, just F.Y.I for future readers!
MARK