I assume its the linered block fitted with Nikasil Liners from Perfect Bore Engineering
http://cgi.ebay.co.uk/ws/eBayISAPI.d...3509&rd=1&rd=1
Please be aware that this isn't a direct fit into a production car without engineering work.
Apparently machining work needs to be done to the block to get a standard head to fit, according to the questions on his advert.
I would assume you could get parts made for it from any engineering shop with CAD/CAM facility's but expect to pay loads for the privilege of obtaining one off work.
Im personally more curious why Ian decided to sell them rather than use them himself
heres some engineering shops to try
http://www.wlrprecision.co.uk/home.html
http://www.kovacseng.co.uk
http://www.jandaprecisioneng.co.uk/