Although it was a long time ago, I have used this brand before, not for the TR7, but for another car.
It was fine, fitted good and did what it was meant to do (which isn't much, it just had to fit, sit and stay put without falling to bits)
It was in a work ute and copped an absolute hiding, often soaking wet, always filthy and all manner of indignities inflicted upon it, the carpet out lasted the car.
What this company does is they use the floor pan of the actual model of car to mould the carpet to the required shape. So it should fit well.
I guess they cut the required floor pan out of a wreck make a jig to keep it in shape and
then keep it on hand until required, they must have a pretty big range so must have a shit load of moulding jigs.