You will need the bell bottom pants mesh for the slimmer bodybuilder from
here for these to show up in your game.
Here are another 8 basic casual outfits for the slimmer bodybuilder consisting of jeans with an un-tucked button-up tee.
They are organised into 2 sets with 4 outfits in each set.
Set 1.
Set 2.
Credits:
Mesh - Marvine