Thanks for the responses!
Bertie, I googled "Bostitch staplers" and the first thing that came up was this
! I think those would be a bit too
industrial strength! Their other staplers
look pretty convincing too though! Might be worth a try!
I noticed last week that my model 747 stapler has a little engraved message on it saying 'use only Swingline premium
staples'. That little instruction had escaped me before; Silly me, I've been foolishly using their regular (and apparently not recommended) standard
So, I know, I know, but this weekend I paid a premium price for a box of their premium
staples, which come in shiny plastic jewel cases. I'll give them a try. I really want to believe
! But for the record, they look exactly
like the standard staples...