Call your local CAA office and ask to speak to the tech person who approves the garages for a CAA thumbs up. CAA approved garages follow a set standand for repairs and customer service. Ask the CAA if a) the garage you went to is approved, b) have there been any complaints, c) is this type of repair within the rate book that sets out what a job should take to do. They might be able to help you out with some solid recommendations on who to go to and how much to expect to pay.

At least if you use a CAA approved garage and things go south with your repairs you have some recourse to get the CAA to mediate a solution or a fix/refund.

As an aside, I had a clutch repair done about 15 years ago and the going rate back then (on a domestic model) was about 1500.00 (in Ontario). Make sure you qualify whether the estimate is held to a certain percentage of over charge - usually within 10%. Some garages will lowball the estimate and then charge up when they get the job. Make sure you get it in writing that they will hold to a 10% increase and if they have to go up, they require your permission to proceed. This will help you to avoid a bigger than you expected bill when you pick the car up.

You have the work that this garage will do, you don't need to take the car in to another garage, all you have to do is inquire what they would charge for the same job etc.

hth