Tascam AK-DC2400

It is well made, it does fit, and it looks the part with the Tascam logo etc.
However, in my extremely humble opinion, this should ship with the unit as standard, and for no extra charge. 75 quid is very expensive for a cover, even one that's lined and has Velcro straps across the back.
It's the sort of thing your girlfriend buys you because she loves you and it's not about the money.
I'm fairly sure that if Behringer started cloning them, they'd be 9.99 and not a lot different. All that said, you do need something to protect the machine and, other than the plastic bag it came in, this is really the only option available.