Hi Shaky Doug,
Thanks for the reply.
No they are not Polyflex mounts, it turns out they are called "Globe Ever-Stay Motor Mounts
" made by Globe Rubber Products.
I wrote to Defender.com, ( Defender.com Search Results: Eng020A
)the only company that had some advertised on the web, but they tell me that they've sold out of stock and that Globe no longer make engine mounts!.
So that leaves me with the problem of finding new mounts that are comparable to my existing Ever-Stay M5's which are 1.5 inches high with mounting hole centres at 3.25 inches. I was really hoping that somewhere, someone might have an Ever-stay M5 lying around that they'd didn't need and were willing to sell it to me.