i have seen just the thing
im sorry if this sounds a bit gerneral, but i saw the stuff a while back:
there is some sort of solder paste that you just squeze (dosn't matter if it joins the traces) then plong the chip on top (so the legs match the traces) then put it in the oven, as you heat it the solder paste sticks around the metal reconnecting it to the board.
im sorry i dont remember what it is called, but it seems the idea solution. search for bakable solder or solder paster and you might find it
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