I have manitou's also, I wouldn't recommend changing the coil, I did this on my bike and it's now very awkward because the coil wasn't designed for the fork, but if you still want to do this commpletely unscrew the left top cap and use an alan key to undo the right top cap, now push down on the handlebars and rmove the coils lubricate the new ones and place them in your forks put the Caps back on an pull your handlebars all the way up and screw the caps back on. As for the parts your local bike shop should have some in the back.