good morning, I have an MTX Thunder6500d - will do all of the power you need @ 2 ohm, I've got two and the other I've ran @ 1 ohm on my Orion HCCA 10d2 but have since switched out, its in like new condition. Give me a PM if you are interested - I'll get you a pic when I get home if you'd like.
i have two memphis 500d's one is a chrome studio and the other is a newer model. both do 500 at 2 ohms rms. pm me if you are interested. Prolly less than 100 shipped.