I have bought and just received a shocksock for ASDA ARNOVA 8 EAN 5052274215418 to fit my Titanium 80.
If you google dimensions you'll find :
ASDA Arnova 8 : 20.5 x 15.3 x 1.2
Archos Titanium 80 : 20.5 x 15.4 x 0.99
It's an absolute perfect fit. I have several shocksocks already for several Samsung devices.
Also I am searching ebay for a second charger for the Titanium 80 : Look for HNC050200X and you'll find a 5V 2A charger with Plug 2.5mm x 0.8mm (Smallest Possible Connection Size).
I like this Tit80 tablet especially the screenresolution, but it's rather heavy. Wifi is ok/good at home (but my other devices show better wifi reception) and excellent wifi-reception where I work. There is improvement needed for the wifi. I also prefer plastic back-cover instead of this aluminium back. Battery life could als be better.