Now I am a bit stingey at times and proper snapcaps for Nitro Express calibres are usually a bit ridiculously priced.

Can't a couple of normal cases be used with spent primers? Perhaps with a couple of seated bullets to chamber them easier.

Now if you have a proper case with all the accoutrements the nice shiny snapcaps do look good in them, but my case is a just an old leather double shotgun case I had on hand.