Fausto Gresini, team principal of the San Carlo Honda Gresini team, has confirmed to the official MotoGP website that Ben Spies and Scott Redding - as well as current rider Alvaro Bautista - are under consideration for 2013.
Spies is already confirmed as leaving the Factory Yamaha team, while Moto2 star Redding recently tested for Ducati and has made clear his premier-class aspirations.
The Gresini ride is the only RC213V seat not yet taken for next season, with Dani Pedrosa (Repsol), Marc Marquez (Repsol) and Stefan Bradl (LCR) already in place.
Former Suzuki rider Bautista took his first MotoGP pole at Silverstone, where he went on to finish a career best fourth in the race, but his momentum was stunted when he caused a first-turn accident at the following Assen round.
The Spaniard is seventh in the standings, one place behind rookie Bradl. Gresini is the only Honda team to run Showa rather than Ohlins suspension.
In the past Gresini has been provided with full factory motorcycles for Daijiro Kato, Sete Gibernau and Marco Simoncelli.