Does anyone have experience in retail truck accessories business?

While this has not been on my radar, living in Texas, it appears to have potential.
Looking for past experience with positive/negative advice.
What I'm seeing with this vertical to include, by limited to:
-manufacturing headache racks
-to bumpers
-gooseneck hitches
-spray in bedliners
-also, Line-X franchise and others

Any advice, multiples, outlook, etc.

Thanks in advance!