If you need to spend some time alongside in Sidney then Westport Marina is probably one of the best value options. Although the washrooms and facilities are not quite as five star as some of Sidney’s other marinas they are perfectly adequate and represent excellent value for money.
Jensen Marine, the on site chandlers, does not hold a large stock, but they are massively helpful and within 24-48 hours seem to be able to order just about any part or spare you could possibly want.