This is what I would do if I want to buy the calendar:
Send an E-mail to Il Teatro del Silenzio @
info@teatrodelsilenzio.it
I am sure there will be someone that speaks/reads English.
Or, if I were you and don't hear from Teatro del Silenzio after a few resends of my message, I will try:
Comune di Lajatico
Via Garibaldi, 5 - 56030 Lajatico (Piesa)
Tel. 0587/643121
http://www.comune.lajatico.pi.it/
E-mail:
clajatico@comune.lajatico.pi.it
Tel 39 334 795 7670 - 39 334 798 0410
and maybe they will pass your request to Teatro del Silenzio people.
In Spanish there is a say that means: "The one that perseveres succeeds!”
Good luck!