Travel on those fork is way too long, frame geometry will be well pi**ed.
Same forks I had on my summit with the yellow/green logo. The steerer/crown is on backwards, the forks should be at a slight forward angle compared to your head tube.
I believe any brace from the Mag series will replace your broken one, the later forks had the better/stronger/stiffer braces. I also run a brake booster on the front of my bike as it helps stiffen up the front end.