Feel for you mate! Sometimes feels like your going one step forward two back - a?
I had a nail, not on the outer edge but about 1.5 cm from the outer side of the wheel - no big branded places but would touch it (they wanted 250-300 for a new tyre). Got a wee independant place to fix it for a tenner - I havent had a spot of bother with it. If the tyre was nearly done fair play but it was 6 weeks old