I can only suggest you that one that u already showed up ... and np man . its totally not bulky and if u want u can switch it to wear it from the bot up ...
you will also need an undersuit that is next to your skin . totally worth it wearing it !!

and btw . it covers the belly to a bit. so u have something over the codpiece! ... 2 flies with one strike baby !
keep up the good work mate!