I hear you, i just dont think the seat mesh would work. Maybe just a black fabric. My interior is split, black bottom with a tan top. If that is what yours is like its best just to keep it or cange it all to one color. Just my two cents.
suede would look horrible too. you wouldnt want to mix the lether and suede. especially with that being the only suede in the car. a nice black fabric would look nice, you could even put like a red stipe of fabric in the middle and have contrasting threads with it sewn together.. but i think your best bet is solid black.