Refer to your pic with the interior of the Chevy, you might have to convert it to RHD before/after importing to Sri Lanka, AFAIK.
http://www.motortraffic.gov.lk/index.php?option=com_content&view=article&id=89&Itemid=119〈=en
Why don't you try Singhagiri Samsung Repair Centers? I have no experience with them but one would presume that they know thing or two about Samsung products...
http://www.singhagiri.lk/singhagiri-samsung-repair.html
I think he meant Prince of Wales Avenue (Sirimavo Bandaranaike Mawatha) in Colombo 14 - near Sugathadasa Stadium... there's a bunch of tire shops in that area.
Ground clearance of subject vehicle models:
Nissan Sunny FB15: 130 mm
Toyota Corolla AE110: 150 mm
Suzuki Swift HT51S: 165 mm
Source: http://www.cars-directory.net/