Too bad.
Well, was just a try, a fellow truck driver, somebody related going on vacation, such things are possible.
Regarding the parts, if you can’t find them I can assist you of course 
If you ask me - I will definitely NOT recommend to fix this issue solely by yourself - please hire an experienced bike mechanic and accept help.
Me neither - therefore I’d really love to check myself.
In direct comparison with my four bikes (and three front tubes) we should be able to find the issue.
My problem is that I can’t find any other logical reason for this issue than above mentioned - I’m more or less forcing myself to this conclusion.
Let’s try another approach:
Can you find anything else different between the misaligned SX and the LT?
Also not that easy, because you had to filter properties which are caused by the fairly different wheels…