I would still talk with dell and find out if they would replace your cradle. If not, sorry.
On a bright side, you can use the Charger adapter that came with it and charge your x50v. Also, you can sync your handheld using bluetooth (provided that you are in WM2003

). If you are not interested in paying 49 dollars for the cradle, you could buy the sync cable for 29 australian dollars, or you could find 3rd party cables that maybe cheaper than these.