Chargers for power tools 18V (Calcutt HG5)

Hi. I have some power tools to donate to a local Men's Shed but the chargers are missing and I'm wondering if anyone has some spare.
One is for Bosch 18v batteries with the semi-oval shaped stem Please see the pictures.
I'm pretty sure that these are fairly generic shapes so the chargers don't need to be branded
The bosch batteries are marked as T in the top terminal, C in centre right, -ve in bottom left and +ve in bottom right.

Many thanks