The timing chain cover and sump are typically not carried by parts shops unless you want to pay through the nose for aftermarket ones. Your best bet is to try and source these second hand from a wrecker or ebay or Marketplace or Gumtree.
There are a few places on ebay selling timing covers (remember to check if it comes with the front main seal):
New genuine:
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Second hand:
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Proflow aftermarket:
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The sump is going to be a bit harder to source as it's not a commonly replaced or separated item and will likely be prohibitively expensive brand new. It seems like there may be a couple of variations, so look at the part number on your existing pan (the part number will either be cast into it or on a sticker) and search for a matching one. These are two examples of used ones:
Link 1
Link 2
Revhigh seems to sell them brand new, but it's alota dosh:
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4blok:
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This random wrecker:
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Why are you replacing them? At a guess it sounds like you've hit or run over something and damaged the front of the engine.