should i put my broken timing belt cover back on?

i got a 96 geo metro lsi .. and today while i was trying to get to the water pump i broke the timing belt cover on the lower half of the motor . near the bottom of the crank pully crank.

so i wondering if i should slap it back together , or buy a new one snice dirt or water might get up there? or maybe dirt wont get there?

thanks for the time

does any one have one. or know where i can get one for cheap? i dont have the time for junk yard