4th, have them contact Crane Naval surface warfare center. They have tons of obsolete ordnance stored there, a few years ago they got rid of hundreds of Bofors cannons in the twin Naval mounts. Every park and VFW post within a hundred miles has one or two of the things mounted out front. I believe all you have to do is pay for shipping. They may have some of the Oerlikons in stock. The site also has links to some of the bases nearer to you, they might have something as well.
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