cdvntx, those look like Isuzu part numbers. Call St Charles Isuzu (800) 727-8066 and ask for Merlin. He's a really good guy to work with and tell you if they are available in the states or if they will be shipped from Japan. Mention this website to get free shipping. If you are prompted to leave a message - just call back every 10-15 until you get him.

Another source is IsuzuParts. Never know which will be the cheaper price once shipping costs are factored in.
"S&H will be calculated at 10% of the price of the item, or a $9.95 minimum."