John Ulrich has a couple of photos of shields on his site but does not repro the correct shield for your car.
http://julrichpackard.com/fuel_radiator_gas_caps.htm The shields look about the same thruout the years and construction is similar. The support dimensions or bolt hole locations and the bends are slightly different depending on engine, pump and which bolts the shields mount to. Slots, notches or cutouts where tubing to and from the fuel pump is routed thru are also different shapes or sizes depending on pump.
The one for your engine is shown on plate 86 of the 48-54 manual and if you compare it to Ulrich's you can see the bend is in a different spot. 22 and 23 series 288/327 engines used the same shield but only in those two series. While your engine and pump is similar to later years, difference in 22-23 series from the 51-4 shields is probably a slot for the different vacuum tube route and maybe clearance for the side motor mount used on the later engines.
Nothing fancy in the construction. Just flat sheet metal which appears to be 16 ga for the shield portion and the mounting brackets look to be 12 ga.
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