If your initial search on hammerwall doesn't come up with any matches. Try to leave off the last letter of the model number, or Letter, Continue dropping off letters off the end, until it pulls up something, or the length becomes to short to turn up a result. The reason you would do this is often the last numbers or letters of a model number are for Color, or minor revisions, and thus may not be important in regards to an items core functions.Example: If you had model number 917.1222351, and it turned up nothing try 917.122235. If that doesn't turn up anything try 917.12223. Of course this may show up less revelevant results but most of the time it's very close or identical.