"I am negotiating with all three," the Brazilian told Agencia Estado. "Before, it was all the teams, now only these three."
The 23-year-old admitted his preference is Force India.
"There is still a chance to close (a deal) with them," said Razia, referring to the vacancy alongside Paul di Resta for 2013, even though Adrian Sutil is regarded as the favourite.
"But I can't afford to be choosy," he admitted. "I'm still not a F1 driver, just a wannabe."
Razia said he is confident his talks will bear fruit.
"Fortunately, I have good relationships," he said. "Here (F1), it's not so much about what you deserve, but what you can get.
"I'd like to have something by early December, so I can relax more for Christmas. Maybe next week we will have something."