As mentioned above, its good to get list of all the 147 Type training institutions from CAA web-site and get in touch with them directly.
The prices of courses depend on the Type and vary from company to company and location to location.
You might get it cheaper if a Company is doing a course for a customer and then sell the vacant space to somebody from outside (If they are really desperate to fill the seats).
Even though the prices vary,keep in mind about the quality of instruction and the reputation as well. Even though everything is now under EASA 147 but I have come across people having difficulties in getting Approvals if they did the Course from someone Notorious in the industry !!!