Rudy knows what you need
but you might want to check out the Defender, West Marine or other catalogs if its only a little part. I have found Rudy to be very helpful, and unlike the catalogs, knows O'Days inside and out. I recently bought new standing rigging for my O'Day 23 from Rudy, and he knew the dimensions (confirmed by my measurements), and put together the package for me in less than a day. Try getting that type of service from one of the big boys. You may get a lower price from one of the catalogs, but there is something to be said for the peace of mind you get by buying your stuff from someone who knows your boat as well as you do.