Have you tried these sites?
There is a
For Rent By Owner site here.
And I can also highly recommend
JD Management. They have that website but you might want to give them a call as they often have listings that are either not yet posted or are more fleixible than what is shown on their site - e.g. weekly instead of only monthly.
Can't speak for the first link but we've used JD and I think if you search the forums, you'll see that they were recommended by others.
Happy hunting!!