Hi Ronald,
Which specifications of the AD8045 are you particular with? I would imagine that the op-amp you want would have high bandwidth and a fast slew rate. You could check out the ADA4817-1. It has a high bandwidth of 1.05GHz, and has good distortion specifications. It is a little bit slower than the AD8045 though, at 870V/us.
If you could provide more details about what other specifications are important for you, I could try to suggest something else.
Thanks!
Kris