Two Flemish tapestries from a set of 29 which are being restored, arrived yesterday from Brussels, where they were woven originally in the 18th century. The tapestries were commissioned by Grand Master Ramon Perellos who donated them to St John's Co-Cathedral. Four tapestries have been restored so far, two more leave for Belgium today. Restorer Yvan Mes De Wit, president of De Wit Laboratories, which is doing the restoration work, said yesterday the Co-Cathedral tapestries were unique in the world because the set is complete.