I made my own, and I like having a 2 part system, so I can adjust based on the flow days.
I have a base which is PUL then topped with a bamboo/cotton baby terry, with pockets? at either end. The absorbent natural cloth pads fit into them. I did 2 part so I could adjust absorbency as needed (I don't reuse the base...as I can fold them and snap them in such a way that the PUL is on the outside, and the pad is a small square for transport) I also quilted the inner pads, so they would stay flat and keep their shape. If just a liner was needed, then I didn't use the inner pad - the terry worked just fine on it's own. heavier days, I doubled up, etc.
Hope that helps.