Go to their website and look for a 'contact us' section and send your information request to their customer service group. They (any manufacturer) will usually be more than happy to send you all the literature you need.
If your local shop doesn't carry the product you want, ask them if they will order it for you, but be prepared to pay up front for what you want since most shop owners already have a collection of things they have ordered for folks that were never picked up.