HEY!!! (hehe..sorry...couldn't resist. )
There's a thread here that may help - titled "Best Signing Companies" - here's the link for that thread
Start there - there is some good info in that thread..
Go to Notary Rotary - they have a "Signing Central" - a comprehensive list of Signing Companies and title companies accumulated over the years, added to the list by notaries, rated and reviewed by notaries. Just please, if you use that site, please please please believe what you read - if there are numerous posts or ratings saying they don't pay, low pay, slow pay, blah blah (and I mean numerous posts - not the one in a million that just sounds like sour grapes) then believe them! The notaries there have taken their time to share their experiences both to help anyone looking and to warn anyone looking for companies to work with - trust their experience...then use that info to your best advantage.
Again, good luck