The snaps were probably installed by a po or used floor mats from a j##p and cut them to fit the 40 or somethinglike that. You should ask the po. They're not stk.
A stk 40 didn't come with carpet or snaps. The stk rubber matt is closer to cityracers version and i think it says Toyota on it. It's 1 piece covering the hump and foot wells.
Post a pic of your rubber one.