Well, working on the basis that a cheap lead isn't very cheap if it doesn't work, I splashed out and bought one for just under a tenner today!
It's not branded, but has "model A03FK" printed on it. A quick Google suggests that it's probably the same as ones sold under the brand names Prosound & Mistar...and loads more I would think.
Worked straight off, no timeout errors etc (WinXP) so I'm a happy bunny.
Next to try - running the Librarian software under Wine...