I believe the Quill is attached to the barrel assembly ? My thoughts would be to make a pin that would fit the inside of the quill and with a nub that would fit the hole in the recoil shield .Place pin in quill and use a stout "C" clamp
with something to protect the top strap of the barrel and grip the quill and top strap with the gun closed .tighten the "C"clamp until the pin in the quill will align with the hole in the recoil shield. Go slow an you might need to make several tries to get it bent enough without springing back.
you might want to cut a "V"in the fixed foot of the "C" clamp .
Others might come up with a better way

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