First off your Chevelle looks outstanding!!! You must be like me "detail oriented".
I too hate dealing with SMS and I'm in the states. They sent me a perfect sample for my headliner but after about a 5 month wait I got what looks correct but made of vinyl instead of the material sample they sent me before the job. Now that it is done and in no one will know unless you touch it but wasn't happy with their slowness, excuses and then a bait and switch for material.
Ron