If it is exactly like Imara's and the same size then JoTika wll probably sell you one if you ask them nicely. They've just sent me a replacement anchor for my Cumbrae. The fittings aren't listed on their Website at the moment but I just emailed them and got a quick reply with part number and cost inc. p&p.
If you know what you want, (size, type and scale) I would think that any of the kit manufacturers will be willing to help in the same way.