All the current manufacturers produce models that will be suitable for your caravan. You just need to look up the specifications.
If you are looking for a recommendation, than I'm sorry but I won't promote one above the others, with the exception to discount all movers that attach to the A frame are not as universal in their ability or safety as those that drive the caravans main wheels.
You will inevitably see some glowing recommendations for some manufactures. The problem here is that often the recommendations are based on the companies ability to put things right, rather than getting right first time.
Be wary of recommendations because most people making them have only experienced one make and model of mover, so they cannot offer real comparative opinions.
I suspect in reality there is not a vast difference between the alternative makes in terms of outright reliability, so it really comes down to price, or if a particular feature is important to you.