Legal billing services using Timeslips

I am a lawyer with a small practice. I have used Timeslips billing software for years. My assistant who took care of billings has left me. I do billing monthly. I need someone who will work a very small amount of time each month to get my bills out, which will require them to enter my time and include my expenses billed to clients. I doubt this will require more than 10 hours per month once up and running. I have the software and all my historical billing records on a laptop that was used by my assistant.