Sad to say that I don't think there's any possible way to get an account without pixonic getting the data off of their servers. Unless you're a super spy hacker extraordinaire or know one and can break into their network. I've lost an account and severly overwrote progress and both times I sought out help here and all roads led to contacting the pix help desk.
I've only been here a year, so I think you pre-dated me, but awesome to have an old school War Robots vet back!
"Never pick a fight with an ugly person, they've got nothing to lose."