Oil Filter washer on 4.4

Hi All, the w/shop manual says to replace the washer(?) when renewing the filter. All the filters I have just supply a big o ring for the body. Does it mean the ribbed one on the spindle? This would seem to be the only seal that could possible make a difference as it seals the top of the filter. If so I can't seem to get a part number, does any one have one? Any thoughts apprieciated as usual.

Think it means to renew the copper washer that's on the sump plug when you drain the oil

Thanks Hippo, puts my mind a ease instead of looking for a parts number that doesn't exist!

If yu really want one - Halfrauds do a range.

Thanks, I should have added the copper washer is in with the filter, but the in housing filter must wear - pity its not available.