(Antec p193) Can't lock my dustfilter in place

Hi Antec

I am having a problem with my dustfilter locking meckanism on one of the front fan filter.
The meckanism "clicks" but does not lock in place.

The case is only 6 month old and the fan filters has only been taken out once a month for cleaning.

I have a pic of the broken part.

I wounder if there is an easy way to get this fixed without having to take all the components out and RMA the whole case?

Thx in advance / Martin