However, Stapleton refused to be drawn on the names being considered as a replacement for Bobby Williamson in the Home Park hot-seat.
"Whoever we have interviewed, or will interview, I'm quite keen their names are not bandied about," he told the Plymouth Evening Herald.
"We are not aiming to keep it open for too much longer. There is a reasonable chance of it happening before we play Southampton on Saturday.
"We are still reviewing our options."