I had thought about a higher output E1, and I found it.
The E2.
Actually, I have a couple of the MN-02 bulbs on order for the E2, which would probably be what a HOLA for an E1 would produce anyways.
The only bulbs I've heard of for the E2 was the standard and LOLA. The pyrex bezel brought alot of speculation of a HOLA for the E2, but PK and, I believe, another person or two from SF assured us it wouldn't happen.
The LED bezels, like the MN-02, might be a great go-between for the two lights.