If I was going without the cluster, I would look into some of the better bicycle speedos. Yes they say they do read up to as fast as you want to go. Small, digital, and usually has several other functions. IIRC less than $50 is what I was looking at a few years ago.
Headlight "ears" are seen and available on ebay. Turn signals that attach to the headlight bucket or the forks are also there.
The next thing is that most relocate the radiator overflow, usually to behind the battery, and use one from a different Kawi, don't remember which.
Personally I like the bullet style fairing, the roundish one that houses the headlight and hides a lot of wiring.