For the delrin rods, go to McMaster-Carr. They are an industrial supplier. You can get the rods in many different diameters. Get the standard length (I think it's 36") and just cut them to the required length. Use Dlerin, it will last longer than Nylon. You may find what you are looking for in here.

You can also try MSC

I hope this helps,

Nick

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'84 H16
'82 H18 Magnum
'74 Pearson 30
St. Louis, MO