As title says.

I'd try calling the tech store and seeing if they have any of the 800's left. They've taken them off the website now but they were going super cheap so I reckon its worth a try.
1800 022 888

are you just looking for a response amp or anything that fits those specs?

Cheers, Grant

Anything?

I have a Cadence ZRS-8 just sitting at home here it is 1500wrms @ 1ohm also has custom painted covers, I'll let it go for $400 + postage if have any questions or want some photos just send me a PM.

link to some details on the amp --> Cadence ZRS-8 Website

I HAVE A KICKER ZX1000.1 BRAND NEW IN BOX. $500

Got a 2 channel AudioSystem F2-500 amp if you are still looking...

2x 230W @ 4 ohm
1x 800W @ 4 ohm
1x 1250W @ 2 ohm