The Ruger SR22 comes immediately to mind. Same manufacturer, very similar design, and seems to be getting good reviews. Personally, I have shot neither of these guns, but I do have a 22LR pistol for the same reason -- inexpensive range practice. However, as much as you want the same feel as your SR40 -- you won't get the same level of recoil or feel, even if the 22LR is identical. What you do get is continued practice with sight alignment, trigger pull, and form. -- plus more shooting on the cheap.
That said, it seems obvious that you would want to at least check out the SR22. Or, recognizing that you won't get the exact feel of your SR40 in a 22LR, you might want to find something else that feels similar and shoots well. I like the Ruger MkIII Target, but there are lots of other Ruger 22LRs and other reliable 22LRs for that matter. Rent and shoot some if you can to find one that you like the best.