Whirlpool dishwasher - Replacing soap dispenser door?

I have a DU1055XTVS2 Whirlpool dishwasher. One of the posts on the soap dispenser door snapped off. I can put the door back in place, and it latches, but when it releases the soap the door flies off. Is there any way to get just the missing post or a new door? I don’t want to have to replace the entire dispenser assembly if I don’t have to.