Just for your information last year I bought 4 winter tyres on black-painted steel wheels from mytyres.com, on my GD Jazz, 14" wheels. They arrived about 3 days later, from Hamburg (you can track the journey in some detail from the german courier). The wheels seem to be the exact fit; I did wonder if the offset for example would be a compromise but it seems not. Not that I can find anywhere what the value should be, I even asked my local dealer who looked up wheels on his parts system but no information was available.
The only thing I noticed was the Load Rating of the delivered tyres was 86, not 82. This doesn't particularly matter (provided it's not less than it's supposed to be) but it might ride a tiny bit harder, not that you'd notice since the tyres are different anyway. Just check that when they arrive, or if you ring in your order ask them the question - I'd be interested to know what they say.
All in all I was very pleased with the purchase and strongly recommend winter tyres, it makes a big difference on the GD. They're stacked in my garage ready for action in November...