Hi nesral,
not sure if this info is out of date but there may be some leftover parts from goldsearchaustralia that are still for sale.
worth a try and bargain price too
(just tried to post and found I'm not allowed to post links until I've made 10 posts)
have a look at the goldsearchaustralia website and there is a 12" tdi dual field ex demo coil listed for sale at $180
pt