driveshaft help please

[addy]

For the last couple of weeks, had a knocking noise whenever i've turned the steering wheel to the left, even if only 1/8 of a turn. Seems to be worse when going downhill and off throttle.

Suspension and brakes appear ok, steering joints seem fine too and even swapped tyres to eliminate them as well. Fairly certain problem is with CV joints/driveshaft.

Anybody had any experience with this?....

and anybody know of a good place to take and get the car fixed (assuming driveshaft problem?)