If you look at that page I linked, there are some items shown in both white and yellow gold. When you click on any item, the listing comes up with a drop down menu which lets you choose the size cup you want.
I see one there that has cups in large sizes, up to 10mm.
https://www.bellafindings.com/3721/c-14k-heavy-weight-pearl-earrings-26302-14k.html
A heavy weight finding is good for large pearls. It won't tend to sag in your ear as much, either.
I do not know what size cup you need for the size of your pearls, however.
Note that this does not come with ear nuts (earring backs). Those have to be ordered separately.
Heavy weight findings have a thicker post and require ear nuts that have a hole large enough for the post to pass through. I'm sure Bella has ear nuts that would fit a heavy finding. I'll have a look.