Aside from the loincloth included with Apollo (which might work with some tweaking) the only thing that I know of is this for-pay outfit from RDNA:

http://www.runtimedna.com/mod/bcs/index.php?ViewProduct=716

Given that they're having their 50% sale right now, it's ten bucks.

Sorry. There remains not really enough clothing out there for Apollo. :(