Try cross referencing the Prius OEM part numbers and with OEM Corolla/Matrix/Vibe/Prius C mounts. If the numbers match, then see if someone offers polyurethane motor mounts for that model. Question: are your motor mounts currently ripped/torn or failing in some fashion? Another option is removing the mount(s), and after cleaning, tape up one side and inject/apply Goop, E6000 or ShoeGoo into the voids. All three products are about the same, though there may be various offerings in each product line. Be sure to get the one with the applicator tip and or be prepared to make a mess.
I have a video where I recorded the engine while I had the car running, and it shows the engine having play on that front motor mount. The rubber isn’t torn, it just seems like it doesn’t hold it to well.
