I recommend charity shops. If they don't appeal maybe these could fit the bill. I don't have one but have been tempted. they appear to be very good quality and value.
http://freespace.virgin.net/peter.marrow1/
My Sou'west chunkie arrived today from the above link, great people to deal with and the jumper is fantastic, made to measure, I'm gonna call it tailored !! Really thick, really really thick, great quality all over, just been out for a 20 minute walk in it (minus 1 here) and I was warm as toast, brilliant value for money £22.00 !!!.....go get one !!