Urgent request for short term place to stay in Paris

Hi all

Just got this from an SFN member - can anyone help?

My 13 yr old son Leo and I are heading back to Paris tomorrow to renew our visas--we will be there for 8-10 weeks and are desperately looking for somewhere not very expensive to stay. At the moment we arrive on Friday (have to be back by Saturday) and have nowhere to go--a little nerve-wracking to say the least, but we only got "permission for the court yesterday"--so I am very edgy about it. I am sending out messages to every contact I have who might know someone in Paris--if you have any ideas at all--I would so appreciate it!