Yokohama C drive are no longer available but blue earth is a similar alternative. Or you could try Avon ZV7 which MMC have been fitting as standard for the past few years.
Balancing of wires is only really successful if special balancing cones are used, which hold the wheel in a similar centred position to when it is mounted on the car. My experience was that some tyre fitters when asked, would answer in the affirmative, even though they did not have the cones available so you really need to shop around and as you have done quite rightly, look for a recommendation.
Because I knew what to look for, I visited several fitters and asked to see their equipment first. Even then, Some modern electronic machines don’t seem to like the cones as they throw up an error code that the wheel isn’t mounted properly.
My experience of black circles was fine for price and delivery time BUT the tyres were transported loose in the back of a delivery van and with all the sliding about, picked up a lot of cardboard dust which was engrained into the sidewall patterns. They looked second hand…but with elbow grease came up ok. If only they had been put in a large polythene bag it would have been much better.
