Had a dig and found the
digital pulse adjuster
and the
LCD hand controller
Although on the web page it doesn't mention that you can use it for power steering, it does say so on the packaging.
Now there is some assembly required as they are in kit form, so you do need to be handy with a soldering iron. I know a bloke that used the same kits to convert his Triumph TR-7 to EPAS, though he used an EPAS from something else (I can't remember which), I intend to use this on my TR-7 with MGF EPAS.
I might even get another for my MGF so as I can adjust the assistance more to my taste.
Here's a good omen......There's even a picture of an MGF on the packaging!
Jaycar ( the mob I got them from) will do international mail orders, but you may be able probably find the same stuff locally.