Karen - if you are using traditional wood arrows I have 9/32 nocks in a couple of makes (AAE 'Z' nocks and Bohning 'Legend' nocks) Both of these have a loose throat to them which may suit your needs. You can see the AAE Z nocks on my site
The Longbow Shop - traditional longbow arrows and archery supplies. If you want give me a shout via PM with your address and I'll happily send a couple of samples out to see if they are any good for you before you buy
Cheers
Jason