I've got some results gents. I went to visit the Oregon Leather Co. here in nearby downtown Portland. They happen to carry mostly FIEBING'S products. I took in one of the lighter saddlebags and told them I wanted to match it to my darker seat. We initially agreed that the seat looked like the Oil Dye color "Chocolate". After preping the bags with "Dye-Prep", I tested the dye on the bottom panel of one of bags - way too dark and seemed to be lacking the redish tint so I tried the Oil Dye color "Walnut" on the bottom panel of the other bag. The shade seemed to be close but still too dark. After reconsulting with Oregon Leather folks I learned that my technique needed to be modified in that I needed to dab most of the dye off my lamb skin; ie: apply very little at a time, and then really work around / work in what was left on the lamb skin. I'm really happy with the final match.
To seal the bags up, it was recommended to use Fiebing's Tan-Kote but after finding a YouTube video that compared the water resistant properties of several different products, I decided to try Fiebing's Acrylic Resolene on the bottom panel of the bags - problem is that the Acrylic Resolene gave the leather a shiny / luster appearance (was told Tan-Kote would also give similar result). Although I did continue to use the Acrylic Resolene to seal up the all the bags' leather edges by using a Q-tip applicator, I finished the the bags' panels up with two coats of PENGUIN brand Water & Stain Repellent - It just sprays on, soaks right in and leaves a natural-looking appearance. Pictures to follow: