Import Rules ForumX -> VB -> XF (question to VB experts)

We have managed successfully to transfer from UBB ->Vb -> XF thanks to Mike help.

I see now that the postIds have changed. I found out that full details are provided in the xf_import_log for the operation VB->XF, but the postids have also changed in the UBB->VB operation.

Anyone with knowledge on the VB knows if the VB stores the change of the IDs somewhere? If I could have that information I would be able to create a redirect script from the old UBB Urls to XF-