Smooth-faced blockwork suitable for painting.

Hello all.

On the lookout for a bit of recommendation. I’ve a challenge the place the unique exterior wall is painted sandstone.

I’m trying to scale back a window opening and puzzled if there was a block that would offer an analogous end just by portray?

If not, any options?

Thanks upfront

https://preview.redd.it/2aexqwd9dsfc1.png?width=851&format=png&auto=webp&s=fe1b32d8fb7b464324ff85ce8cebeb9c3b4e45a4