Looking For A Nishijin Model B Part

[sparky kilowatt]

My brother-in-law, nephew and I are in the process of restoring their Nishijin model B Japan Airlines themed machine, they've had it for years, previous owner removed some back pieces to grease moving part (ugh!). We've got the machine all taken apart, playfield removed and are in the process of cleaning and prepping for the new playfield, but we're missing a part.

Does anybody here by chance have a clear plastic sea saw cover (see pictures) for a Nishijin model B they might be willing to part company with? I've tried a couple of on-line parts places, both show the part as "out of stock".

Thanks in advance.