Replacement crystal for Kuvarsit 360 cases

[mir36]

I've bought Kuvarsit v1 and v2 360 case-sets from the board, but neither came with crystals. Now I'm having problems getting a tight fitting replacement crystal that won't pop-out with the slightest push of my thumbs.

Does anyone know if the Noob, Hfact and BigCrown cystals are a good fit for the Kuvarsit 360 case?

Thanks in advance.