Hi,
First, just to let you know, please make sure that you search around on this forum, there has been a large number of topics regarding SAS.
SAS will have to be custom, for the most part. Calmini was going to offer a kit, but I think that there hasn't been enough interest in it for them to release it. See Eric Bewley's Kick, he's got the prototype.
I run a SAS setup with leafs, and currently Toyota Landcruiser FJ80 axles. It's in the garage trying to be finished up before Moab EJS in March. I ran last year with a hybrid front axle that we made ourselves using a Sidekick rear center section and samurai knuckles. It had Trail Tough's double tough birfield treatment on it, and was very strong. I sold it to GRVIT (he's a member on here) who lives in Greece.
http://www.granitepath.com/friends/kd7hcg/sidekick.htmlIt all depends on what you want to do. I've seen a lot of people just put a Samurai front under the kick, use the Kick diferential (as it bolts right up) and use leafs or coils. You will need to provide some large spacer or an offset wheel to fix the width, as a Sammy axle is narrower than a Sidekick. This seems to work, but I wouldn't recommend it full time on a daily driver as bearings can break down and a lot of tire scuffing is possible because of the extra width needed by spacers and/or offset wheels.
A lot of people put toyota axles under their trucks too. Find a toyota pickup from 79-85 and get the front and rear axles and install them. They are a couple of inches narrower still than the sidekick, but you could do it.
Some people use Dana 44's , some use 60's, some even the Dana 52's out of the old jeep trucks. My FJ80 axles are nice, they are wider than the sidekick wheelbase, and came with electric lockers and are full floating.
You will also have to come up with some way to create or install an SYE for the drivelines. We installed OTT's Kicker 3, which installs a Samurai Case behind the Kick Case (dual cases) and therefore the SYE was a no brainer since the Sammy Case is all ready that way.
Custom drivelines, Custom spring perches and hangers, etc.
Lots of choices, but better know how to fab, or have a buddy that does.
Heather