Just saw this, if it's any good to you - they're the correct size but not sure about the look!
Alloys from S-MAX
I'd forgotten that with Ford's ownership of Volvo at the time the C70 was first built, they could be another avenue to explore for styles. Now I think about it, I'm sure I've seen a C30 with Focus RS alloys on.
I guess the alloys from the later facelifted C70's would also fit your car, they're a lot sharper-looking than the Syrmas.
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Current: 2012 C70 D3 SE Lux Solstice Geartronic, Caspian Blue.
Also: 2002 Audi A2 TDI SE, Crystal Blue
Previous: 2008 C70 D5 SE manual, Flint Grey.