I have dealt with Andrews and found them to be very prompt with excellent prices. You should also consider Bintel, who are also in Sydney and online at
www.bintelshop.com.au. Bintel's prices are very competitive also and they test & collimate their stock before despatch.
BTW welcome to the forum Yagon, a fellow windsurfer (wavesailor?) I see, not many of us round here. I have a 2.5m custom board and quiver of sails to suit, but due to home commitments I haven't been out for a few years....