Thanks for the reply - I'll pass your comments on. I was in the the USA a few weeks back and coincidentally needed a new bridle assembly for my Narca 6.0. I guess it would be the same Bob at Performance Cats who helped me out - excellent service: a new assembly was delivered to me within 3 days and that included getting some parts bought in. I hadn't thought of calling him - I think I'll pass on Bob's details as he was very helpful in the past.
Simon.