Help! Need to slam inverted forks

[Rberry]

Guys I need some advice on inverted forks i have ultra 58mm forks and need to drop 2" i read a post where he said that he used a moco kit I think, but cant find any thing on that kit.I can't find any one that Can tell me about lowering inverted forks, progressive and burly say there kit won't work but they don't say why, I hate to buy the kit and it doesn't work, perhaps they just haven't had any one try it. Any ideas