[mumofstig]

I'll have to try a few, I think 

[Auntiemogs]

Aji Dedo de Mocha? This is one of the largest-fruited of Ají peppers, the beautiful fruit are shiny, almost waxy in appearance and glow a deep red when ripe. Incredibly productive and a favourite every year. Without the heat, subtle undertones of Ají flavour come out, with distinct smokey tastes being the most obvious. One of the easier unusual and rare peppers to grow. It can be over wintered if you keep it frost-free. Gently smokey Aji. Not hot - mostly: the occasional pepper is warm, especially towards the end of the season, or with plants in their second or third year.
Peppers are about 3" long x 1/2" wide
edit: Whoops - just noticed you said the don't turn red (unlike I just have  )

They aren't what Mum was looking for but they are exactly what I was looking for, thanks!

Only had 2 seeds left last year.  One came up but it was a bit late, so I decided to overwinter it...