I bought Powerflex top mounts for the front and can see no way to make them fit. Any ideas?

The back axle of my car has Deflex bushes in and the quality seemed on a par with the Powerflex stuff at a fraction of the cost, but 3 weeks ago I ordered Deflex rear spring pads, anti-roll bar bushes and exhaust hangers and they just arrived today - sad to say, they don't look great at all - voids and bubbles all over the place.