Reverse tow weight site?

[Len_Cuff]

May sound a bit odd but I am thinking of changing cars and wondered if there is any site where you can input the weight
of a caravan and it will tell you which cars would be suitable?

 

[mat1]

http://www.whattowcar.com/
Tow car search half way down on the left hand side

mat

 

[Len_Cuff]

Many thanks.