I say do what it takes to not use the nic.
If you have to use the fake, seeds, gum, candy, jerky, then use it.
I did, and I eventually stopped, it was fairly natural.
I couldn't find it much at Walmart, and that helped, but every once in a while at certain times, I'll dip some coffee grounds.
But now at 250+ days I really don't use anything much. But I know I am an addict and I know I crave things, might not be nic at the time, but I get craves for "something" through the day or week.
Don't beat yourself up for that oral fixation thing.. be glad you are quit and move on, it will pass.