You will need the
MESH_ju-beos_slimtop050802.package for these to show up in your game.
Here are 16 muscle tops for Marvine's slimmer bodybuilder.
They are organised into 2 sets with 8 tops in each set.
Set 1.

Set 2.

Credit goes to Marvine and Beosboxboy for the mesh and muscle shadowing and wirelessguy for the textures/alphas.