XF 1.3 IPB->Xen: IPB paid subscriptions to Xenforo upgrades?

Has anyone successfully converted their IPB subscriptions to Xenforo upgrades? Moving over the packages is no problem, manually, but we have a lot of members on paid subscriptions and I'd rather do that in SQL or whatever if at all possible! The built in converter doesn't seem to handle these.
Thanks, Mike. Guess I gotta do 90 upgrades by hand… I looked at the table structure and I might be able to set up a converter but it'd probably take as much time (esp since I haven't figured out the IPB subscriptions format yet.)