If you are looking to just improve your front suspension. you can try using heavier fork oil 15 to 20 weight , dropping the front forks into the triple clamps an inch. like:
Higher rear and lower front = less likelihood of running wide in corners and quicker turn in. You can also get heavier fork springs??
I know people just wanna buy a second hand USD set of forks and just adapt them but its sometimes its just better to improve what you have unless u have a set of Honda RS250 forks....
my 2 cents...