I purchased spare spools for my ABU reels from Poingdestre's in Southampton. 02380 510077
They were the only firm that were prepared to go out of their way for me. They even took a spool from a reel because they could'nt guarantee delivery within the time that I asked for. Since then I have been using them for all my mail order. They might not be as big as some of the other mail order companies but they certainly come up with the right price and the service is one of the best.