Which Op Amp would work best as buffer for my function generator?

Hi everyone,
I've been searching data sheets for the last couple of days trying to find an Op Amp that would work for my specific application, but am just not sure which would be the ideal fit. The Op Amp I'm looking for will be set up in a voltage follower configuration to be used as a buffer for the output of a home made function generator. The max frequency will be 1 MHz, outputting sin, sawtooth, square and triangle waves. I've been trying to find something that can provide at least 500mA to the load continuously, but obviously higher is better. The cheaper the better, and I'm open to other buffer designs if you have any that you think would work well for this application, but if you post something different please give a description of how you expect your circuit to operate. Thanks much!

Adam

Hi Fostachild, It is hard to find op-amp that can drive 500mA. You can try Cirrus Logic's power amplifier. If you need to use it as an instrument for testing purpose, you can try this laboratory power amplifier.

Hi fostachild
here is a very good buffer from national semiconductor.but it can source 300mA max with best features current limit,thermal shutdown etc
**broken link removed**
i think nobody will give 500mA for a function generator