There was a guy selling netting type sleeving for the festool hoses, in near enough identical festool green but seems to have got a bit greedy and is racking the price up to £25 per length. I'm pretty sure you could get hold of some from China for a fraction of the cost. I bought one for my CTM36 when they where reasonably priced and have to say it works a treat but it does snag on small splinters like a plywood bench whisk running on a rail saw or on a chopsaw.
As for the hoses, Rutlands seem to have a few hoses knocking around for a fairly decent price, but haven't looked into it enough to see if it'll be compatible with the festool extraction units.