Handlebar clamp blocks

#1
Does anybody know if the aluminum handlebar clamp blocks like shown on this Alsport are still commercially available? (Thanks 45t for the photo)

If that's a 7/8" handlebar, these appear to be the same as used on Sperry Rand Tricub and Minicub. I had one set machined, but if available I'd buy the next set. I'm looking for the authentic, stock appearance. I have found some similar ones with rounded ends and radiused edges.
 
#2
most older motorcycles and snowmobiles use those and they are all very simmilar. surely a general search on ebay will bear some results
 
#5
I think those are the older cast ones. I have snapped a few of them while over tightening. You may want to see if he has the aluminum ones.
 
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