3M 65488, Pro Grade Precision Ultra Durable Universal Hole Sanding Disc, DUH5100TRI-10I, 5 inch UH, 100, 7100202876, 10 per pack 
Insize 6225-100E, UNIVERSAL DIAL INDICATOR STANDS (NON-MAGNETIC),
$261.68
Applicable holding stem 3/8″ DIA
Hardend base
Suitable for granite surface plates or ast iron surface plates
For electronic/dial indicators and dial test indicators
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3M 08217, Universal Adhesive Clear – 3, 200 mL Cartridge, 7100006285, 6 per case
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