Where to find the original stock firmware for Archos 8HT?

Hi all.

I recently bought an 2nd hand Archos 8HT with some custom firmware on it (maybe a Android 2.1 custom build). It's working too slow.
As far, as i know th Archos 8 HT has Android 1.5 or 1.6 and it should work fast. Can someone tell me, where I can find the original FW for this device?

Thanks in advance.

I checked out the ARCHOS and only saw firmware for the Archos 7 HT. What country did you purchase the device in?