I'm planning an August expedition to the Lost Coast on my much-beloved PX10 and today it hit me: I am no longer in high school, and so the 54/42 rings (Campy--I long ago converted) aren't going to cut it. What to do?

Ideally, I want a half-step granny, and I'm willing to pay (within reason) to make it happen. I think I know what the answer is going to be, but thought I'd try anyway: Where, oh where, can I get a triple touring crankset for this bike? And is there any way to make a triple spindle fit in the existing Campy bottom bracket? In a pinch, I suppose I could settle for a Campy triple, which, if I recall, goes down to 36T. But smaller would be better.

Any suggestions gladly accepted. Thanks.