Mains Adapter

Can anybody tell me if there is a compatible mains adapter that i can use on my ist DL2 instead of the Pentax one. I've seen a company called ABC Products on e-bay selling some for £10.99 anyone heard of them. Also it has to be 6.5 volts so would any other adapter with the same connection pin be o.k.

I got one similar to this:

http://www.7dayshop.com/catalog/product_info.php?cPath=777_3&products_id=8158

from Seven Day Shop, obviously, only £9.99 + p&p. This looks like an updated model, but it has the 6.5v output required for my istD, assume the DL has the same requirement. Mine's been fine, although only really used it when sensor cleaning and updating firmware.

Dan