Howdy
If you want a Colt Police Positive chambered for 32 S&W Long aka 32 Colt New Police, you are going to have to go with a Pocket Positive. The standard Colt Police Positive was a larger gun and it was never chambered for 32 S&W Long. The Colt Police Positive special was chambered for 32-20 but that was a considerably larger gun than a Pocket Positive.
The three revolvers in this photo, top to bottom are an I frame S&W 32 Regulation Police, chambered for 32 S&W Long; a Colt Pocket Positive, chambered for 32 S&W Long; and a tiny Colt Pocket Positive chambered for 32 Short Colt, which is no longer manufactured
The Smith is a little bit bigger than the Colt Pocket Positive, but has been mentioned the grip of a Regulation Police is extended a little bit more than on most I frame revolvers.
This photo shows two Colt Police Positive Specials at the top, and the 32 caliber Pocket Positive at the bottom so you can compare the sizes. The standard Colt Police Positive was chambered for 38 S&W, not 38 Special. Unfortunately I do not have one for you to see the size comparison, but the Colt Police Positive Special was built on the same basic frame as the Police Positive, but the cylinder and frame were stretched slightly to accommodate the longer 38 Special cartridge.
Just so you know, Colt patented the Positive Lock in 1905, which incorporates a hammer block that will prevent the revolver from firing if dropped onto the hammer with a live round under the hammer. All the Colts with the name Positive in them employed this lock. Stay away from the earlier New Pocket Model, it did not have the Positive Lock inside.
This photo shows the detail of the grip of an I frame Smith and Wesson Regulation Police. The slightly longer wooden grip was inletted to 'fit around' the smaller metal grip frame. If you look at the bottom of one of these grips you will see S&W patented it in 1917, and because the wood covered the bottom of the metal grip frame, the serial number was located on the front of the metal grip frame.
The S&W Regulation Police was available as a six shot 32 (32 S&W Long) or a five shot 38, 38 S&W, not 38 Special. The revolver at the top of this photo is a 38 Regulation Police, a 32 Regulation Police is at the bottom.
This photo shows a J frame 22/32 Kit Gun and an I frame 32 Regulation Police for a size comparison.
One more photo. A K Frame S&W, this one happens to be a 32-20, and the smaller I frame 32 Regulation Police.
Prices: I paid $400 for a S&W 38 Regulation Police a bunch of years ago. Probably paid about the same for a 32 Regulation Police. The 32 Police Positives are not falling off of trees, but I probably paid about $500 for that one a bunch of years ago. No idea what they are going for today.