You can buy any AeroPress replacement part on our website, www.aeropress.com. 2. Your difficulty pressing is probably due to too fine a grind. Experiment with a coarser grind until your gentle pressing takes 30 to 40 seconds. 3. These experiments will probably lead to a grinder setting between espresso and drip. Also, consider the number of scoops you press and use a coarser grind when pressing more scoops.