While a new french press isn't outrageously expensive, we didn't want to buy a whole new french press when only one part was broken.
I went to a local kitchen supply store and found a replacement glass beaker for $17. Much less than the $40 for the new press. They can be found online for as low as $13 but if you don't want to wait for shipping the replacement is most likely at a kitchen supply store near you.
Rather than buying a whole new press do the research first and save yourself some money and cause less waste! Everyone wins!