That's pretty unlucky! New alloys - Honda really or perhaps an import specialist - most will sell them in sets of 4 though

- it's probably worth checking the aftermarket ones as there will not be that much price difference and if you choose the same size you can keep the existing tyres buit end up with great looking rims.
BTW is the spare a space saver or full sized wheel - you could live with a buckled spare then you only have one wheel to replace
Second hand is not as bad as it sounds - all the other wheels on your car are second hand and in some cases putting on a new shiny wheel will make all of your old ones look shabby!