When I write "rebuild" ... I mean "rebuild" and not "replace".
CRR Luton will restore an existing M3 rangefinder assembly that suffers from separated prisms to "like new".
The rangefinder assembly gets dismantled completely, surfaces are resilvered, recemented,
everything realigned etc. You do not need any spare parts or donor finders for that.
Please read the site that I have linked to in my previous post.