3M 65488, Pro Grade Precision Ultra Durable Universal Hole Sanding Disc, DUH5100TRI-10I, 5 inch UH, 100, 7100202876, 10 per pack 
Insize 6214-A, UNIVERSAL STAND, 6928640313530
$114.06
For electronic/dial indicators and dial test indicators.
With fine adjustment.
Applicable Holding Stem: 3/8″ DIA, _8mm, _4mm
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3M 08217, Universal Adhesive Clear – 3, 200 mL Cartridge, 7100006285, 6 per case
$74.55