Trust us - you're better off right now starting off fresh, anyway. All you've lost is stuff that might have had sentimental value. Your PvP equipment from back then would be mostly out of date. The new equipment, skill masteries, etc. mean that you'd have handicapped yourself trying to adapt. Better to take what you know, but on a new character on that old account, and learn the current state of PvP (and learn some of the new non-PvP systems like the changes to crafting, so that you can make better suits than you had before you left).
The only thing you didn't lose was your account age at the time you let the account lapse, and that's the only thing that is impossible to replace.