RD400 rear sprocket bolts - are they available?

[Hawaii-Mike]

I'm talking about the bolts that insert in the drive bushings on the rear hub.  On the parts fiche, it's #27, part number 90109-12429-00.

There's a rear wheel on e-bay that's missing those bolts.

[DesmoDrew]

https://yambits.co.uk/advanced_search_result.php?currency=USD&keywords=RD400C+Sprocket+Cush+Drive+Bolt&search_in_description=1

Only place I know of, unless you find some used or NOS.

[Hawaii-Mike]

I happened to find a used set on ebay today. 

Researching, I saw this video: https://www.youtube.com/watch?v=Dzf1SJgcvBg

Then I had the idea - why not tap the cush drives then screw in bolts?  They wouldn't be the stock size and the holes in the sprocket may need enlarging.

[m in sc]

I just made some out of aluminum for mine. (the bushings, as i was killing them quickly).  i was considering using m12 bolts though them, but inserted the stock studs back in the aluminum bushings instead.