Poserworld has a business shirt with a tie and sleeves. I don't know if the collar is similar enough for you. Poserworld is a subscription site. It is the "Smart Set" dress shirt and is available in several colours.

 

Poser 11 Pro, Windows 10

Auxiliary Apps: Blender 2.79, Vue Complete 2016, Genetica 4 Pro, Gliftex 11 Pro, CorelDraw Suite X6, Comic Life 2, Project Dogwaffle Howler 8, Stitch Witch