The Battery / Rectifier assembly is constructed from several parts from which the Regulator Assy. is the most expensive.
The lowest price component in this Battery / Rectifier parts-list fiche is the Bolt,hex., 6x16.
A sample from the products for the Battery / Rectifier include: Bolt,hex 6x20, Rub,air/c Mount, Bolt,hex.,6x20, Relay,winker.