Massive phaze modulation oscilator fm style vst

hey. when i have a cool sounding bass i love to put the phase up a couple octaves on the modulation oscilator. it gives me a sort of fm effect. the more octaves up it id the more screech and crazy fm sounding it gets. but i want to put my basses that ive made from other vst’s and my other wav basses through it. so does anyone know a vst where it adds an fm kinda signal to itself to get the phase modulation type effect? i think maybe i could route it into fm8 but thats long. i just want a basic vst.