Hitch Lock for Westfalia SSK Stab Hitch

[Simon_5062405]

I'm having real problems trying to find a hitchlock for my van, it's got a westfalia SSK stabiliser hitch - anyone know of any brand / model to fit this hitch?

 

[Lloyd_5036533]

I'va a "Keep It" hitchlock which came with the van.

Sorry, no other details.