Originally Posted by Duragrouch

Most bike shops these days have a spoke thread rolling machine and stock long raw spokes that they cut to length, if the spokes are constant section (not butted). A good shop tech can measure the spoke lengths fine without removal. For a couple spokes, don't worry about the price, I think they'll be $1.50 or $2.00 each, just standard stainless steel spokes in the same size, and make sure the new nipples take the same size spoke wrench as all the others, and nickle-plated brass, NOT aluminum. If the spokes are ultracheap galvanized non-stainless, the bike shop won't stock those, just use a couple stainless steel ones.

The other spokes are fine, and not all gonna fail soon. Spokes usually fail from a gouge, like if the chain fell against it because of no spoke protector, or lack of stress relieving during initial wheel build.