Exhaust manifold Yanmar 3HM

[Bjornbelief]

Hi guys
After finding out that a new exhaust manifold for a Yanmar 3HM is around $1650 +freight have been trying to find a cheaper solution and found a copy of the manifold on the net.
Though AliExpress.com The manifold is made in rural China and sold though JD Parts and I was wondering if anybody has any experience with the company?
The manifold is a little different to the original but the layout is the same and the cost is around $1100 + tax ( not sure how much that will be) but it has free freight to Australia so sounds a lot better
Any help appreciated regards Bjorn