Where to go for engine steam clean?

Hi all,

As the topic states, does anyone know of a place I can take my Ute to for an engine steam clean?

And no, I'm not talking about some cowboy with a Karcher high pressure washer or anything similar, looking for the real deal.

Also, does anyone perhaps have one of those ultrasonic parts baths? I have a few things which require a good soak.

In the greater JHB area.

Thanks