The filters or the bunchner funnel and flask? If you're looking for the bunchner funnel and flask here is the link,
Deschem 500ml,24/40,Suction Filtration Device,47mm Buchner Funnel & Glass Flask
Amazon.com
But you don't want to use those MCB filter papers. You want hydrophobic PTFE or hydrophobic PVDF. Oh and this exact set up takes at 47mm filter which is probably the 2nd most popular next to a 90mm.
If you notice this funnel has what they call a pore plate on the bottom. That's basically glass with holes in it. You do not want what's called a fritted disc. It takes forever to filter, and it's impossible to clean
