I have those too.
I got 2 pair of 18 inch ones today at Farm and fleet... ("Milwaukee" brand) not 18" reach/ also just ordered a pair of "24" ones from amazon... again not 24" reach/ only (something like) 15-3/4 I believe they said. I just ground off/ drilled out 66 pop rivets covered by bondo on my truck cab back wall. They overlapped ~1-1/2" - 2" and I'm wanting to "pinch" the overlapped area to squeeze the overhang as tight to the original as possible and skip weld that seam/ I may do the whole overlap on inside and outside of cab.... as well as filling in 87 holes... 66 pop rivets plus 21 "bondo tooth" holes. I know it'll be a "spot" weld at a time. I do have some pretty heavy copper bars I can clamp as a backup bar... if I can get something deep enough to reach the cab floor.... as far as Cleco's
there's 3/4-1" left in the overlapped panel to the outside of the Cleco's... they're not right on the edge. If I had some help holding a dolly on the opposite side of the cab wall I could try to hammer the gap shut. Were not talking much.. 1/16-1/8" or so in spots.... but I dont want to just "Bondo" that as the last guy who worked on this thing, did.
I ground off lots of bondo with a Milwaukee grinder and wire wheel.... and dont want to put it back any more than I absolutely have to.
Honestly I wish I could fill the seam with lead.... but I dont know anyone near me that could give me a "tutorial".... or else braze it in. something that will seal and not absorb moisture as bondo is famous for... I met Gene Winfield once.... unfortunately hes gone now and even if not California is a bit far from me....
It would be nice if the idiot on Marketplace that I was talking to last week, would have called me as he claimed he would.... I'd have a different cab that doesn't have this issue
Problem is most I see are worse than what I have for crazy money, would need more work than my current one does.... this one I found on MP (out of state but not crazily so) is supposed to be nice and not need anything my current one does....