brand new odometer gears and repair kits are available, straight from the manufacturer (me : )
Precision made from a tough, self lubricating engineering plastic (Delrin), these gears will never break.
For a single 15 toothed small gear, price is $11 including shipping cost worldwide (with tracking).
A repair kit consisting of a 15 toothed small gear and a 12 toothed gear pod, fixing the problem once and forever costs $19, also with shipping.

,Gears for other Volvos (and other car makes too) are also available.
For complete product lineup, prices and quality feedback, please refer my eBay store:
http://stores.ebay.com/custom3dprintedparts
You can either buy my products there, or save a few dollars by purchasing from me directly.
Please contact me for further discount prices!
Peter






