The Lower Itchen Fishery offers grayling fly fishing on 3 very nice beats starting on 9 October, and bait fishing on a few other beats starting on 20 October - the beats offering trout and grayling fly fishing, and salmon/coarse fishing, are kept separate.
http://www.itchen-fishing.net/GraylingFishing.asp
Again, more expensive than Timsbury, but many of us would argue that LIF offers better fishing. Helps if you don't mind aircraft as the river runs parallel to, and about half a mile from, the runway at Southampton Airport.