Sometimes places will pay return shipping if you're just getting another one. It might be worth asking. Alternatively you could see what the difference is between shipping 1 and 2 forks, if it's the same or only slightly different, then maybe returning which ever one you don't use wouldn't cost all that much. For a $400 fork an extra $10 or $20 to find a matching one doesn't seem that bad.

Their site has a dealer search too. Maybe an LBS would be willing to help you out and you could avoid shipping costs.