Hi newbiedan, Welcome to the forum.
The original Scotty handgrips are very hard to come by these days, as most split or perished, but Rover still make the Model 45, which have a different grip but are available as a spare part.
The Scott Bonnar diamond logo is still used on the 'Queen' electric bowling green mower(36") and you may be lucky to score one from a golf and bowling equipment supplier in WA.
Best of luck with the restoration and don't forget to post some before and after pics cause we all like to see 'em here!!
