here are two links for you to get you on the air fast
and 'on the cheap' ! (but are not Yagi design)

both of these can use copper wire you may already have,
or find in the recycle or trash pile.

half square for 2m (not a yagi but fast and cheap to build direct fed no
match)

http://www.cebik.com/vhf/hs.html

Moxon for 2m (again, not the yagi)

http://www.cebik.com/moxon/moxbld.html

similar gain as a 2 element yagi but takes up less space
and it is direct coax fed so no matching needed !

good luck with the project !

james (also used when making reservations)