PIM Backup is one way and would have been my suggestion. Not sure why that didn't work for you. Another way is to hook it up to your computer if you have Outlook. Sync the contacts with your 700wx then hookup your TP and sync its contacts.
One other way is to setup an acct on an exchange server (
free option mail2web) and sync with your 700wx. After doing this, do the same with the TP.