I am in the trade and would like to know if there are alternative seat runner mounting points on a 2007 VW Polo 1.4. I have a customer with special needs and we need to be able to move the drivers seat even further back than it's present maximum. I know I could remove a seat to have a look but thought it would be quicker to ask and also see if anyone else had come across the need to do this and if so how they sorted it out. Basically I am looking for extra tapped holes in the floor. The vehicle is a 3 door model.

Many thanks