Yeah, I get it, it's quite a quest. I had a similar experience: I was looking for brake components, and only on the International truck parts s1partscenter.com website did I find everything I needed, with a guarantee of authenticity. Navigating the catalog is quite convenient, as there is a filter by serial number - this saves a lot of time. I've ordered several times already, delivery is reliable, and prices are reasonable. I recommend checking it out if you value original parts without compromise.