Pirelli is closer to finding a solution to its current lack of a F1 test car.
In the past two years, the sport’s Italian supplier has used the last car raced by defunct team Toyota to develop its tyres.
But Paul Hembery, Pirelli motor sport director, has said the 2009-spec TF109 is now too outdated and has been retired.
It is believed the marque initially intended to find an agreement to run a competitive 2011-spec car, but the new plan could be to acquire a single seater from the 2010 season.
"We do most of the work in the simulator," Hembery told the El Pais newspaper, "but it’s more difficult to work on the compounds because it requires the interactivity with the asphalt."
The Briton admitted that, so far, the teams have been unhelpful in terms of agreeing a solution for a new-specification car, because of the potential performance advantage that could be gained by the chosen team.
Hembery, however, used the example of the common electronic unit which is supplied to all teams by a McLaren subsidiary.
"They all have it and no one complains," he said.
"But we have asked for help and they tell us that we should continue with the Toyota, and that’s nonsense," added Hembery.
He said talks are still taking place.
"We have to find a car that was competitive in 2010, which was reliable and that allows us to incorporate all the systems that allow us to do our work."