Wakeboarder.com has slider and kicker Ideas. I build the Half rainbow slider. It was kind of big for the first slider I ever hit, but in time you get used to it.
When ever I want to hit one I drive 4hrs to TSR cable and hit theirs. lol. Go to Wakeboarder.com for the slider plans. This is the closest plans I got for a kicker / but it looks a little steep.