Which racket's grommet is interchangeable with Head Elektra Pro 600

[daiw]

I have a near mint Head Elektra Pro 600. However the grommet is brittle with the ages and broke into pieces. Just wanna to find a next set of grommet. I know that it is too hard to find, so the plan is to find interchangeable ones. Head Elektra Pro 600 is basiclly Head Prestige Classic without CAP system. So I wonder which of the following racket is same to Elektra, whose grommets is easier to find

Head Elite 600
HEAD DISCOVERY 600
HEAD VENTORIS 600

Thanks