HARD throat grommet for PRINCE ozone pro tour

[crism54]

where I can find the HARD grommet of the throat for the prince ozone tour PRO (18*20)? if purchase a replacement set of grommet/bumper guard of the prince o3 white, I receive both the parts, soft and hard? it could go well also for the version PRO that it has 18 main strings, and therefore perhaps a tightened more spacing of the strings?
where I can find a photo of this piece?
thanks.

 

[crism54]

I am trying to find the HARD throat grommet for the Prince ozone Pro tour (18x 20 string pattern): in the set on sale they are available both versions, soft and hard?