Hmm... interesting conversation...
Infra, you have one choice. Find a fellow who has a 7210, and ask him if he'll trade his keypad+front plate for your keypad+front plate. I mean we never know if anyone fancies the 7250 layout. I'ma pretty sure that the 6610/7210/7250 front plates are interchangeable, coz:
1. I've got 6610
2. Me friends got 7210, and when I borrowed it from him (for placing an important call, coz i forgot mine at home), the dimensions felt exactly same(even the thickness). Thus, I'm deducing that 6610/7210 are interchangeable.
3. I saw a fellow student having a 7250i, and by the looks of it it looked exactly same as the other two in dimensions.
So, I'm saying that go to a nokia priority dealer or something and ask for a 7210 keypad, then you can buy the 7210 xpress on(original or fake, whatever) and then punch a hole for the back, else just change the front, it'll look whacky especially if the colors are totally different.
Lucky @ndres, he can just print out the covers.