Have done quite a bit of research regarding how to wire up my EF fans & think I have finally found what looks like the ducks guts!
http://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=852/prd852.htm
http://www.ebay.com.au/itm/321155072911?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
Maybe over the top for some though?