Thanks everyone for the help, the faucet turns out to be a Banbury. I found it on the internet, and is the same as the 87110 model, but without the side spray.
While Moen lacks representatives (wait just over 5 min), they were very kind, and I now await the repair kit they have sent me. Thank you all once again.
BTW, Sandpaper Plumbing, I forgot to ask for the exact model, as I told the rep that it was the same as the 87110, only I don't have the side spray. Also, we got this 5 years ago, not 10.