HMM. See I've been tutoring my brother recently and found it surprisingly tiring, so to be honest I don't think I'm up for more. (As it is I had to cancel the last time he needed help) I'm sorry :(

Have you tried the maths learning centre? If you ask the maths office I'm sure they can find you a starving postgrad willing to work for peanuts.

Also I found walking into unisfa and saying "I need help with *blah*, who is going to explain it to me?" works sometimes, that's how I passed my second year electronics exam :D

Sorry again, and good luck!