Did not see that there was a "Noob" section, turns out this is my specialty.

Shackles... Does anyone sell OEM ones? Mine are rooted, pins rusty and turning, holes egg shaped and just old really. I have found greaseable ones that look pretty stock, are they as good or better? I don't want lifted ones, just standard height and don't want bling bling flash looking branded ones. I want the truck to look pretty much stock.

yes. Check out Ebay.

Flares... I would like bigger than the standard NT flares but don't like how the WT ones look after getting dented and smashed. A plastic equivalent would be great. Can you get them? I don't want massive 4" of flare, 2" would be fine, don't want bush whackers or anything to bling blingy again. Suggestions?

Yes you can get aftermarket flares, but they are almost always 4" or wider. You could track down some 88WT flares, as they are plastic.

Rock sliders... Would box section sills (will probably have to do this for rust anyway) handle the odd rock or two? The truck is not going to get wheeled hard, more of a off road, get to remote places, camper really but can 3mm box section sills replace rock sliders? They would give more clearance.

yes, you can cut out your sills and replace with RHS/SHS. Its a common mod. 3mm will be fine for most applications, and clearance should be similar to what you have now. if your sills aren't too rusty, and you don't want the many hours of cutting, grinding, and welding rice paper suzuki panels, buy a set of these..... http://www.twinstickoffroad.com/products/Rock-Sliders.html

I will definitely have more questions before I am done, so might become a "Noob" forum regular!

Cheers.

Shackles.

http://www.ebay.com.au/itm/Greasable-Spring-Shackle-SET-Suzuki-LJ50-LJ80-Sierra-Maruti-/330716125756?pt=AU_Car_Parts_Accessories&hash=item4d00379a3c

Can't see why they wouldn't be the same strength as OEM.

Sliders can be made from 3mm flat plate that has been bent 90 degrees and pop riveted on, assuming underlying body is strong enough.