at best, put a chorus on your post-amp effects. Edit: the Monarchy chorus (vintage chorus) preset gets you pretty close:
1.6 rate to 2.4
I'd like to see a good Dimension D added too.
I have a Line 6 MM4 that does a pretty good Dimension D. Your other options are Boss DC-2W Waza Craft Dimension C, Strymon Mobius. As far as plugins go, UA has a Dimension D that's supposed to sound really good, ValhallaUberMod sounds great. Klark Teknik just unveiled a rack recreation of the original hardware.
I could do a blind comparison of all the ones I have access to if anyone's interested: Kemper's best imitation vs Line 6 MM4 vs UberMod.