I know amazon has perfect replicas and I believe (I'm not certain) that amazon sells them from the nokia retailer/shop.

amazon.co.uk has

NOKIA N900 REPLACEMENT STYLUS TOUCH PEN IN BLACK **EXACT REPLICA TO ORIGINAL** - EXCLUSIVELY SOLD BY TECH-GEAR by Nokia

3 PACK OF NOKIA N900 REPLACEMENT STYLUS TOUCH PEN IN BLACK **EXACT REPLICA TO ORIGINAL** - EXCLUSIVELY SOLD BY TECH-GEAR by TECHGEAR

Modern-Tech Made to Fit Black Stylus Touch Pen for Nokia N900 by Modern-Tech

amazon.com has

Black Stylus Replacement Pen wand for Nokia 5800 XpressMusic [Accessory Export Brand] by Accessory Export

Nokia SU-35 (3-Pack) Stylus for Nokia 5800 XpressMusic device by Nokia