I've got these from Amazon for E3Pro Glass bed, they work good, I'd just recommend being careful when clipping them on, the edges are real sharp and may scratch the glass. And yeah...they only come in bulk packages, lol.
TBWHL Ender 3 Pro Glass Bed Clips Swiss Clip 3D Printer Glass Bed Chip Metal Small Picture Frame Spring Turn Clip for Ender 3 Pro Ender 3 V2 CR-20 CR-10 PRO https://www.amazon.com/dp/B07X2MRW76/ref=cm_sw_r_apan_glt_fabc_YVVJ1PX421Z67PC1VMDN