Anyone know where i can find one of these rare beasts?

They are about the size of a normal air drill, same shape/size body as a die grinder, but use a very thin half moon blade that basically vibrates back an fourth to cut....

Used to use one when i was a panel beater, cant for the life of me remember the brand it was, thus cant find one?

Leccie one's no good as too cumbersome...

really Appreciate any leads