Tel, i'm quite sure that 'anything' can be done through SRP if you have a good enough background. I'm sure that perhaps even an exception for a core 5 base can be made if you have good enough content.
The issue is, that Indies are quite rare to pull out enough 'high quality' content to aim for such a upgrade. I have a feeling it 'is' possible. Indies have plenty of power, they merely need to prove they are responsible enough.
