Just picked up a bike that has the subject rear hub. The rear wheel appears to be in near-perfect shape - true, spins smoothly, little-to-no apparent brake track wear - but I'd still like to pick up a spare set of cones for potential future use if possible.

Unfortunately, new left and right cones for the FH-4400 now seem to be next to impossible to find.

Further, the FH-4500 and FH-4600 are new enough that Shimano doesn't identify the cones for these later Tiagra hubs individually by part number. Rather, Shimano identifies only a Left Hand and Right Hand "Lock Nut Unit" (includes cones, locknuts, spacers and/or seals) by part number for these hubs. For the FH-4500 and FH-4600, these "Lock Nut Unit(s)" are the same (part numbers match). But since the cones aren't identified by part number for the FH-4500 and FH-4600 hubs, it's impossible to tell without having one of these "Lock Nut Units" in-hand if the cones are the same as those in the FH-4400.

Anyone out there know from past experience if the the cones for the FH-4500 and FH-4600 are the same as those for the FH-4400? Or know of another Shimano hub that uses the same cones as the FH-4400?

Thanks in advance.