I was unable to find that particular model at montgomerywardsmanuals.com. I would double check the model number. All the MW manuals I found were for 3 or 4 numbers + the letters.
It's also possible that you will have to look for the manual by the way the machine looks. Most all the manual sites have what appear to be technical drawings along with the name or number of the sewing machine. Finding the "picture" is the way you have to find many Japanese made sewing machine manuals, as many sewing machines were sold under several different names.
It's a long shot, but you might post a photo of your machine and someone might be able to ID it. I finally found one
photo of a 82URR and it is very similar to one that was discussed last week. Whether the one in the photo is really an 82urr, we don't know as the description is kind of unusual.
bkay