VO only has the bolts for triples. Harris has those too....

The guy at reneherse said that the triple bolt sets sell more than the doubles so there isn't as much stock of the double bolts and apparently TA charges a good deal more for the double bolts for whatever reason (most likely because they can)

Those are some lovely bikes they build over there at that site....expensive as all get out and with a 28 month waiting list....but absolutely beautiful.