It isn't my idea, but Dana's (Lost Horizon)
I thought that this idea deserves credit and it applies not only to a Series 2 XKE. My used BMW jack (EUR25) was easy to modify and works great without effort. It is also very light and small compared to the Metallifacture original. On top of it, the nylon pad does not scratch the paint as much, as the Metallifacture jack will.
Talk about E-Types here