Best steering damper / stabilizer I can get without spending too much (budget)?

Ohlins, Scotts, GPR, Hyperpro are your best bets.

Ultimately though, you get what you pay for.

You shouldn't be getting tank slappers on the street.

Why not address the issue instead of putting a band-aid (dampener) on it?

Have you checked the fork alignment? Have you checked the front to rear wheel alignment? Have you checked that the fork trees are actually torqued properly, along with the fender/brace?

Think there is something else amiss.

Also, how is the rubber? Over two years old? Is tire wear even?

I agree with Ian. There's something wrong at the front end, and a damper will only 'paper over the cracks'.

Adding to Ian's list: Wheel bent or out of balance, worn wheel bearings, incorrect tyre pressure, head bearing race not adjusted properly, worn/bent/misaligned forks, fork oil levels different /wrong.

It's about the stiffness of the totality of the forks.

There is something else wrong with your bike or maybe you just can't ride.

Make that 4 useless non answers. Happy to help anytime.

also check steering head bearings - if the bike has been in any sort of head on incident micro dents in the track or flats on the rotating elements can add a slight notchieness to the steering that is unnoticeable at low speeds but can cause tank slappers. Also of course poor lubrication & adjustment & general wear & tear.

You really are a whiny brat, aren't you?

You got some decent responses.