Id keep looking i think what you are into is a fairly common request.

I love facesitting (doesn't matter if you are kinky or vanilla i think everyone loves Facesitting). I also like a little smell with my Facesitting. Post workout or long summer day does the trick for me. It doesn't have to be overwhelming for me but I'm not trying to smell soap the whole time.

Feet and farts aren't my thing but i think there would be dommes who would be happy to indulge in either. Like you say plan ahead. I think if you lay out expectations someone will be interested. Maybe you pay a little extra to have them skip a shower or workout for beforehand. Tell them how important smell is to you. I think its pretty easy to get a good stink going on feet.