I do not know what the suply houses have in your area. I do recommend the product called NetaFim. The are the leaders in drip / low volume irrigation. They manufature all the filters, emitters, tubing and etc. you will need. Here is a link to their site. They may have a link on teir site for local distridutors for you to contact.
www.netafim.com/Contact_Us/
or
www.netafim.com
Josh
Irrigation /Landscape Lighting / Pump and Well Specialist