Here's a link to the drain plug (Ron Ayers microfiche is a great info source):
http://www.ronayers.com/fiche/400_05...70&parent=3280
The oil filter looks like a "normal" spin-on that shouldn't be too hard to find. Just make sure you torque down the drain plug to the right value and change the plug gasket. Too loose and it could leak and too tight you could strip the threads. Find out how Kawi recommends tightening the filter as well and don't forget to smear a little new oil on the filter gasket. Fill the crankcase and check the level according to Kawi's recommendations (bike level or on side stand, it matters).