Do you mean as separate devices? I know the sampler has both of those built in. The LFO is also a separate device and it has as the random mode, which is about as close as you’re going to get to a S&H. It is a random-value square wave; as in random +/- values. If you want to also randomize the timing, hook up another LFO to the first LFO, and have the auxiliary LFO modulate the timing with the same random setting. Set values to taste. As far as lag/slew, I don’t know how to make those happen, but there may be a way. You can even make a Doofer out of them to get that as an all-in-one device.
Vowel filters are available in the modulation devices (Chorus/Flanger/Phaser). If you want to use them separately, you can just turn the effect level down on the modulation portion. So, turn off the Chorus/Flanger/Phaser, but use the various filters.