Ok, I think I found one:
Tripp-Lite Inverter
Could you guys looks over the specs and make sure it fits the requirements?
I believe it does it has:
700 continuous watts/ 1400 watt peak
80A at 12V DC loaded, 0.95A at 12V DC no load
As far as the modified sine wave, it doesn't look like it, but here's a cut/paste of what the site says:
Maintains PWM sine wave output voltage of 115 V AC (+/- 8 V AC)
Thanks!