Take a look
here. It's the only one I've seen that mentioned smoking. It's Polish, but you can probably adapt it with the seasonings you choose to use.
A word of warning: most of the recipes call for the stuff to be made and used in a very short time period, or the stuff degrades. Be careful, or the gods of food poisoning will have something to say about it!
I do like the liverwurst, but a little goes a long way.