Hi There,
I have an unused Batt Wayfarer spinnaker - I bought it new from in 2010 from Batt - it has a sail number on it that's not mine - but decided the old wayfarer I had wasn't in good enough shape to risk an extra sale. Now moving house realise it's time to pass it on! Happy for you to make a donation to charity for it. It's yellow and green - can send picture if you like.
Will