Try the road side 'petti kade's in the Panchikawatte area. I know because I bought one for my AE100.
Also I got to know later that there is a guy running a petti kade in front of the Puhulyaya grocery @ Navinna, who is claiming he can rebuild the vents. (I guess it's a pretty much DIY job if you have the right scrap and some patience).
First post btw..