never used a case or tempered glass on a watch before and not a fan, but this one is really good..IMOS sapphire..comes in 2 parts, the frame and tempered glass..

Before




After

I think no shops have it, you can try Shopee there're a few sellers, but if you want someone to do installation for you then look for Shopee seller - Sakurazz. You have to meet at his place though..

take note though, it'll transform the watch border into chrome.. so if you like the original look, then i'd suggest not to go with this...