Here's a thread about the Limited gauge cluster:
click here .
It'd be pretty difficult to get the graphite trim pieces for the door panels because from what I understand, you'd have to trade out the whole door panel. The part for the front cupholder lists for $71 and the rear vent lists for $96. I think it'd be easier to see if you can get an aftermarket dash kit put on. I've seen the granite type on eBay.
The factory leather seat covers are EXTREMELY expensive, the leather headrests lists for almost $500. Additionally, Toyota doesn't make the "Dark Charcoal" colored leather seats for the 4Runner, only the Taupe (tan) and the Stone (gray), so it'd look out of place in your Sport. If you really want leather, you can get an aftermarket leather kit which a lot of people have done.
Here's a good thread about aftermarket leather.
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2003 4Runner SR5 V6 4x2 - Pacific Blue Metallic/Taupe Leather