I'm almost certain, but not entirely, that the clutch basket is identical to the Sporty 1200 one, I know it was for the XB12R (the clutch shell, basket, plates, ect all have the same part numbers)
The XB9 might be closer to the 883, any dealer should be able to quickly reference that though and then I'm sure you'll have more luck finding a clutch from a sportster.
I put a clutch from a post-2000 sportster (don't recall exact year now) in my XB12R and it operates correctly.
I did have trouble getting a chain the right size (you might have one already though), the sportster ones have a different link count except for a few specific years, and I know the XB9R chain is shorter because the front rotor is smaller. I ended up just buying that from Hal's H-D here in Milwaukee.