What model is the one this guy picks at min 5:10 for showing carbon colour?
at first I thought it was the racing jackets, but then I checked racing's images and realized the arm's hinge shape is different from the model of that video (at min 5:10).
I feel the same way about venting and would prefer non-vented lenses. But as you pointed out, non-vented lenses are scarce. Memebers can offer you sets from their own collection and others will offer them on Ebay. Last summer, Oakley very briefly offered non-vented RJ lenses (with unique SKUs) on the main site but then disappeared just as fast.
If you cannot acquire Jawbone kits through members here or on Ebay, I suggest you try a vented RJ set and see what you think. I resorted to the vented lenses and found they were still very good and the venting did not obstruct vision as it did with Split Jacket. While I would still prefer non-vented, the venting is still preferable to an aftermarket lens and the difference may be immaterial to you.