I agree that most the headlight brackets are far too long - I am using these Dime City ones on the 36mm Ninja forks.  To fit the 38mm Savage forks....I believe the rubber is too thick and will have to be drilled out (impossible to do on rubber)....so maybe just some rubber floor mat cut to fit.
http://www.dimecitycycles.com/vintage-cafe-racer-caferacer-bobber-brat-choppe...

I am not yet convinced that the LED replacement bulbs provide better vision down the road than the Silverstar.  The LED makes a whiter light and it does light up the close area a bunch more - but the light reflector doesn't seem to control the light pattern as well on the LED's and the light beam seems to scatter more - and the result is that the high beam on the LED may not shine as far down the road as the Silverstar bulb does.  The LED might be shining down the road more - and they light up the reflective signs and road markings more - but it could be that the LED makes all the close up stuff so bright......your eyes adjust to the bright light and you lose a bit of the ability to see the faint things far down the road.  

Yep, those are expensive.

I am not sure you have to drop the fork legs.....it might be easier just to take off the top triple tree.  You would support the bike under the engine, put a blanket on the tank, loosen the handlebars and set them on the blanket, remove the fork caps and center bolt on the top yoke, and pull off the yoke, and install the headlight brackets.  It would be best to have the front wheel secured to keep the forks from flopping around while you are taking things on/off.

One of the things that appealed to me about the ones I bought, is that if the arms don't work right, I can make a set of arms from aluminum or stainless and use them with the chrome clamps.

Whoo,2 days off and raining time for some upgrades on the tracker !
I can squeeze another H/P or two out of it.
You will all just have to due without me for a couple a days , can you handle it , I know it's goin to be tough but I will be BACK !