The engine mounts on a S1 Lotus Esprit are the same as a Bedford van. I picked them up on eBay UK for relatively cheap, but the downside is that they don’t have the locating tabs which lock the motor mounts in place. The solution was to purchase four set screws that have roughly the same diameter face as the locating tabs (I made sure they weren’t soft metal wood screws). Then I marked where the tabs should be on the new motor mounts, drilled the holes, tapped the holes so the set screws could go in, and then anchored in the set screws. The only thing I had to be careful of was drilling too large a hole (then the set screw wouldn’t be able to go in tight), or drill too far into the rubber. Otherwise, it’s a pretty easy job.
I marked the spot where the screw should go in on the new motor mount.
Then I drilled, tapped, and anchored the screw into the motor mount.
The new motor mount attached to the powder coated chassis bracket, ready to go!