This has been on my watch list for sometime now, also the seller has more options at his store.
Porsche 996 986 T96 Sport leather steering wheel Carrera Carrera C4S Boxster | eBay
With regards to the shift knob I went with a Momo shift knob like this one:
http://www.advancespeedshop.com/images/momo_SK_combatEVO_BLK_chrome.jpg
but keep in mind that if you go with one not OEM then you will need to "round" the shifter for it to fit, not a hard job at all with a grinder attachment on a drill.
Wayne did a write up also here:
Momo Shift Knob Installation on the Boxster... - Pelican Parts Technical BBS
Have fun and post some before and after photos.