Hi Alvaro, welcome to wolverines
Here is a translation of your post....I'm a lover of experimental aviation special gyro-prop, I'm building a Hornet, after a stroke lost and continue the construction job with donation of friends who, like me, has helped us aviation lovers, we're missing the rotor, propeller and engine instruments if anyone wants to help us we're quite grateful, we need also to AN screws for the project. interested in in this project contact. alvarofranciscolins@hotmail.com
Aircraft Spruce is one of many places to buy aircraft bolts and parts http://www.aircraftspruce.com/catalog/l ... ralite.php this link is for tires, but you can go to all sections from this page
sometimes propellers and rotors turn up on here for sale... so keep looking 
Where are you located? What is your country?
Good luck with your machine
