I've been researching 22mm bullhorn bars and they do seem to be available from ebay and internet stores. So that should be OK.

And we've started getting a bit of stuff together. The first bit was a soft-sided suitcase that matches the BF-Samsonite one that we acquired from a recycling shop at the local dump. We paid $20 for it, and it's in remarkably good condition. We drop by a couple of other recycling shops to see if we can pick up a similar one.

It's not that we are being cheap on this. It's just that we are unlikely to use the Samsonite case for touring, and the recycled suitcases can be left behind at a destination without feeling guilty about it.