Mini DP - DVI-D adapter?

Anyone able to recommend a Mini DP to DVI-D adapter that supports 2560x1440 @ 60hz?
Last part to complete my QEMU pass-through project (thought this would be the easy part).
I ordered one which said that it supported 2560 however it won't go over 1080 (and doesn't work at all on my laptop).

I've found a few which say that they are what I'm looking for however after digging around there seems to be plenty of cases where these adapters aren't what they say they are.

I've found a dell adapter which looks like it could do the trick however its £37... (I could probably find an old GPU for that much).

Cheers