Either do a search for PEDL or simply Disney and make sure you are searching the Paris stock Exchange and it will come up. I bought mine two days ago by telephoning the number on their website having uploaded money to my Selftrade account (which you need to do first). Price was a little over 6p per share, so total cost for 2000 shares was £137.70.
When you log on to your account after the trade, you will find a 'contract note' and apparently, this is sufficient to the shareholders club to prove ownership. Good luck.