Please take a look at the muzzle nets I make and sell on ebay, here is a link to one of the three types.
Nets aren't a solution for all headshakers - but when they do work they are a wonderful relief...
Please take a look at the muzzle UV protectors I make and sell on ebay.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MESELX:IT&item=130314873227