I couldn't find one so I did this, but I'm going to move the solinoid box tomorrow forum won't let me upload the photo but if you look at my posts you should see what I did to mine
There are a few on the market but are very expensive and not in the uk.
I work for an engineering company so I am going to get a proto type made up and work out costs etc.
Have got some ideas drawn up to show the draughtsman at work to have a ponder at:thumb2