Avon is now a part of the Zodiac group. I would check through some of the contacts/dealers listed on this website with regard to getting Avon parts. The only problem is that
anything ordered through Zodiac's milpro division will be outrageously expensive.
http://www.zodiacmilpro.com/
What specific parts are you in need of? Perhaps one of our British friends might be able to connect you with a source for those parts (new or used) at more reasonable prices.