I was doing my yearly torque and visual inspections and noticed one of the bearing cap seals was degrading. I called Moryde to find out the size of the seal or if I could buy a handful of them. The only thing that they could do was sell me a new cap as it comes with the seal. The closest matching seal I found to this was from Napa auto-parts. There part number is 727-2231, a 2 5/8 x 2 7/8 x 1/8 oring. I replaced the seal and torqued it to 19 foot pounds. If I find a perfect match I will edit this post with the information on the replacement.
Old seal on the left and new on the right.
A spare OE seal and the seal from Napa.
My receipt from Napa.