If you use the " Ask a question" button, he will reply, he does not answer his phone to numbers he does not know, the reason is that he is a one man band and to answer the phone he has to stop work.
Drop him a message and he will reply to you, give it a try
http://www.ebay.co.uk/itm/Ducati-Rac...1#ht_500wt_922 Chris