请教大家 kitchen exhaust fan

I wanted to clean my kitchen exhaust fan and to do maintenance.  After taking it down/out, there is problem.  The motor still works fine.  But the grille/cover does not attach any more.  The grille goes up with two screws on each side.  The grille is partially broken so one screw does not attach any more.  Also, the grille is not looking good any more.

I tried to find a grille on line but have not found one that mounts with two screws.  The one on Amazon that I did find does not show where the screws attach to.  I left questions, but have not received answers.  I found one that mounts with a screw in the center.  But my motor does not look likelike a hole can be drilled in the center. 

So I have been looking to replace the whole fan.  My fan does not have any ductwork connected to it.  The ones I found on line all have ductwork.

My solution temporarily is to put the motor and the fan back without the cover.  A friend suggested dumping the fan and patching the drywall.  It is probably not ideal, since the fan, even though only through internal circulation, is useful.  And there is the cavity and the electrical work already there. 

Could anyone give me some suggestions?

Picture 1 is the cavity where the fan was.  It is not the ceiling.  It is above the stove, microvawe and the cabinets.

Picture 2 is the motor and the fan (just taking it down).

非常感謝.  I won't be online much this afternoon, so thank you to all in advance.

大家中秋快乐！ 

所有跟帖： 

• show me the grille where the screw is inserted. -borisg- ♂ (0 bytes) () 10/04/2017 postreply 10:13:46

• I will do it later -joeyli- ♀ (110 bytes) () 10/04/2017 postreply 10:33:15

• local HD has duct free exhaust fan around $49 -IEbird- ♀ (0 bytes) () 10/04/2017 postreply 10:42:58

• this is the one you are talking about? -joeyli- ♀ (93 bytes) () 10/05/2017 postreply 07:02:30