I've only read this thread today.
Back in the day when it was a grant, I could understand the idea of not being able to get a second one if you've already received one for the same level... I considered a second degree years ago (before it switched to loans), and although it meant I couldn't do it, it seemed perfectly reasonable to me that I couldn't get a second grant...
But now it's loans, not grants, and especially if you've already paid the first one off... doesn't seem quite as acceptable to me.
I do hope you can find some way to do it.