You should look at buying NIMH rather than NICAD, they're a newer technology and last quite a lot longer, they're only slightly more expensive these days so worth getting.
Bear in mind though that when charging you cant mix NICAD and NIMH, on my charger i have a switch to select between the two types so i guess there is a difference.
try www.ebuyer.com or www.maplin.co.uk both should have a whole choice of rechargers.
You should look at buying NIMH rather than NICAD, they're a newer technology and last quite a lot longer, they're only slightly more expensive these days so worth getting.
Bear in mind though that when charging you cant mix NICAD and NIMH, on my charger i have a switch to select between the two types so i guess there is a difference.
Simon.