I buy the filter at the auto supplies in my area, alot of them carry many kia parts now. Last time I changed mine myself, After some cuss and sweat I got through, it's really simple when you learn little tricks. The mechanic's name is khemraj, 756-9573.
I got the side steps from auto Korea tt, they told me they do the supply and installation for southern sales, you can check them out online, they include installation with their price. http://www.autokoreatt.com/