If you want a nice but reasonably priced clutch perch and lever get an MSR with the quick adjust setup. I have one on my dual sport and it's actually, umm, call it "remarkably similar" to the $150 ASV perch and lever combos, but mine was about $30 new at the local shop.
Any of the parking brake block-off covers will work, but one thing that should be noted is when you install it you need to put some sealant on it to keep the moisture out, only a few of them come with o-rings but even with the ring i'd use sealant. Water would likely rust the piston to the caliper body if it got bad enough.
If you want good skid plates get PRM skids, hands down. Yeah, you might save 40 bucks getting one of those no-name things off ebay but they're junk in comparison. The cheaper ones are just a flat piece, not formed to the frame, and they don't wrap around to protect the front or sides of the frame. The mounting hardware is also guaranteed to rattle loose frequently and most are made of some pretty thin, useless aluminum. PRM skids come up to 1/4" thick aluminum, almost bulletproof.