I don't think a leaking injector would sieze an engine. I suspect it was rich enough to mess up the fuel trims and reduce power severely, then when the engine died or was shut off the dribbling fuel filled the cylinder enough to prevent cranking until it was cleared.
Thus, I would suspect no bent parts in the engine. No need to order conrods or pistons, which typically bend when an engine hits something solid in the cylinder. As stated before, liquid is extremely strong in a hydraulic stress situation and acts like a solid under compression.
As for metal shavings...
Fuel is a shitty lubricant. When oil gets diluted with fuel, it starts acting on rubbing places first. Any place that has pressure and a rubbing motion. Think cam lobes and bearing surfaces. Rod and crank bearings. Any place with high mechanical pressure and sliding motion. Things like cylinder walls and oil pumps and such don't get hit hard...at first. Usually crank bearings are large enough compared to the oncoming force that the actual pressure is low. So they go second -ish.
Check the cam lobes, the cam journals amd bearings and other "small" places with sliding motion. I bet you find the wear there. If the engine oil is "glittery" and not full of chunks, chances are you can cure the raw fuel leak, change the oil with some higher than normal (20W-50 Aeroshell???) Viscosity oil and run it a hundred miles then change back to your normal oil.
I suspect, from your description, that is probably the problem.
Now, I have a haircut scheduled over the speaker phone so I gotta run...
