Is it possible to upgrade my Time Capsule hard disk and keep the backup(s) from the original?

Can I upgrade my Time Capsule to a larger internal drive and keep my original backup(s)? I'm aware you can drop in the new disk, the restore it as a new TC using AirPort Utility, and I'm also aware you can migrate backup(s) from an existing TimeMachine drive to a new one - but I want to do both: I want to replace the 500gb drive in my Time Capsule (2nd gen, 2009) to a 1tb drive, and I want to keep the existing backup(s) from the 500gb to the new drive, so everything is as it was, just with a larger internal drive. I understand it's not as simple as swapping the drive, restoring it as a new TC and then using CCC to copy the data from the original drive, so is there a solution to what I want to achieve? Basically I want to upgrade the original TC drive to a larger one and not lose my previous backup(s).