You can purchase butcher paper from various retailers depending on your volume needs:
You can often buy small amounts directly from the meat department or deli counter; sometimes they may even provide a small amount for free.
A standard, clean-looking paper for general wrapping and presentation.
You can find meat-themed wrapping paper or printable meat labels on platforms like Etsy for gags or decor.
Amazon offers a wide variety of precut sheets and rolls, including pink (peach) paper popular for BBQ smoking.