parts
for your bracket,
all you need is some .25 allum , maybe a 5"x3" or so.
put it next to your rail so you would have enough room for a bolt hole above the existing hole. put it in a vise like that or use some c clamps or the like.
now just drill the new plate through the existing hole .. now put a bolt in there and tighten it down real good
ok now drill a couple holes on the legs of the rail that come down, through both the plate and rails . doesnt have to be big.. ok now put bolts in there and tighten
now just drill the hole above your existing mount hole where you want it.
get a marker and mark where you dont need material, and remove the plate you just made.
ok good, now get out your hacksaw or angle grinder and trim the exsess plate off you dont need or that stands out from the stock profile , besides the new mount hole you added, transition that into the profile. make it look purdy.
alright now bolt it all back up and add a .25 of spacer / washer whatever between the new mount and your front arm.
other ways to get this job done , but its not a big en devour