You can get,
60/4 Urubokka Colombo 4.15 A.M
(via Kotapola,Morawaka,Akuressa,Imaduwa,Galle,Hikkaduwa,Ambalangoda,Benthota,Alutgama,Kalutara,Panadura,Dehiwala,Galleface)
42 Deniyaya Colombo 12.50 A.M
(via Deniyaya Handford,Beralapanatara,Kotapola,Morawaka,Neluwa,Pelawatta,matugama,Kalutara)
353 Kotapola Matara start from 6.00 AM to 5.40 P.M
(via urubokka,pasgoda,Mawarala,Mulatiyana,Makandura,Kamburupitiya,Thihagoda)
398 Kotapola Middeniya
353/3 Urubokka Kotapola(via pattigala,Kakundeniya,Beralapanatara Kirilipana Kosmodara)
353 Kirilipana Karapitiya
(via Pasgoda,Mulatiyana,Kamburupitya,Matara,Waligama,Galle)
Following buses stops here
353 Kotapola - Urubokka
353 Kotapola - Matara