The valve cover breather actually came with the K&N air filter kit. I went out to look at it, and while it is a K&N part, the number on the top of it didn't seem to match up with any numbers on their website.
The crankcase vent filters are on the K&N website under the Performance Products section and you can find them by size, so hopefully that helps.
To help appease low'n slow
here's a tiny little smidgen more of the story before my next update about the front axle. I promise the front axle bit will be a large post.
If you were paying attention (remember, there may be a pop quiz later) my brake booster was partially coated with POR-15 in the dusty shot of the engine bay. I took some time to remove it, separate the booster from the MC and throw it in the blast cabinet. After some hand sanding of tricky areas, both the booster and master cylinder got two fresh coats of POR-15 BlackCote.
Much better. Mini update over.