I'll start be saying, I'm no expert nor am I a doctor but here's my 2 cents worth:
Yes, I have heard of people continuing to imbibe in various nicotine suppliments for years after they quit so you are NOT alone in that respect.
From my experience of quitting, the issue of ridding my body of nicotine was not a major issue. The real challenge was gradually changing my lifestyle to not include lighting up a smoke every hour or so when going about my daily routine. That took a good year or more to really solidify my new lifestyle and feel comfortable with it.
If you were to stop the nico lozenges all nicotime would be out of your body within roughly 72 hours (3 days). That's the phyiscal reality; not the mental/emotional reality.
I'm going to suggest that perhaps your fixation with the lozenges is more mental than physical in nature. If I were in your situation I think I might try going to a registered hypnotist to seek help in adjusting your mental fiz=xation on using the lozenges. Either that on a psycologist for a few session only because I think this is more a mental thing than physical.
Just my opinion. Food for thought maybe? Hope you find an answer to your situation. Perhaps others will have some suggestions as well?
By the way ... I got use to sucking hard candies while I was quitting. Keeping my mouth busy I suppose? I still suck on candies from time to time today. A habit I picked up while quitting and never really got rid of. The only difference between me and you is that my candies don't have nicotin in them but clearly I also have a mental fixation now on having something in my mouth?