First you must give me details of your bank account and basic personal information - I assume that you are terminally ill and wish to dispose of your estate to avoid inheritance tax.
You approach an existing shareholder and ask him/her to sell (if you can find them) or you ask the one broker who deals in this market (Seymour Pierce Butterfield) to find you some. In reality you are probably waiting for someone to die but with the Gills defence that may happen soon.