B series chain guard fixings

[limeyrob]

I have a spare swinging arm for my A10 and someone (not me) has removed all the chainguard fixings. The A10 chainguard I have is a bit tired so I'm thinking of fitting a B series guard.  The brackets look a lot easier to make too. I'm sure someone posted a pic on here but I cant find it.
Can someone please measure the brackets and post the dims?  Thanks