Canada is reaching out to five aircraft manufacturers to replace the country’s aging fleet of CF-18 jets, renewing an effort that has been drawn-out and troubled.

Canada announced in 2010 it would give a single source contract to Lockheed-Martin Corp for 65 F-35 jets but later reversed course as cost estimates soared.

Ottawa has set aside C$9 billion ($8.9 billion) to buy the new jets.

The public works ministry, confirming earlier leaks from senior government officials, said in a statement on Friday that Ottawa would talk to Lockheed Martin and four other companies:

- Boeing Co, which makes the F-18 Super Hornet

- EADS, which makes the Eurofighter

- Saab AB, which makes the Gripen

- Dassault Aviation, which makes the Rafale

The ministry said it would send a questionnaire to the five seeking detailed information on the technical capabilities of fighter aircraft in production or scheduled to be in production.