My two references were people from work. But it was a bit of a struggle for me too I remember. For marriage based citizenship applications, they should lower the amount of time you need to know someone as a reference. They let you apply earlier but you'd practially have to meet someone the day you arrived and then keep in touch with them for the whole time until it was time to apply. I think if the residency time is lowered for marriage based applications, the time you have to know your references should be too.
Anyway, is there no one at all you are aquainted with that you've known for the required time? My back up reference was my brother-in-law's partner. Perhaps there's someone like that in your life you could ask?
