help with pam 328 crystal gaskets

[Lomberto]

Can anyone help where I can get a new set of gaskets foe my Pam 328 and pam 359. My watchmaker heated the watches to take the crystals out for Ar treatment. Unfortunately the silicon shrank. I have 2 beatyfull watches with fantastic AR and no gaskets. I have asked and no one has been able to point me in the right direction yet. Kroexist has done a PVD pam 312 wiith new gaskets. Can someone please help

[Lomberto]

I have measured the crytal is36 mm. I had a look at otto frei wedsite, which one do you recomend