mushroom knife - where do i get some ?

[Philip David Jackson]

In article <3vqu21$2di at sirius.cs.pdx.edu>,
William J Hunt <billh at cs.pdx.edu> wrote:
>what characteristics make a knife uniquely a 'mushroom knife' ?

Lika a penknife but with a small brush at the end of the handle to clean 
the specimen. Also may have a ruler on the handle to check the size of 
the cap for minium size allowed for edible specimens in some European 
countries.

Bye from Philip