Amazon has the Calculated Industries Multi Mark Drywall Cutout Locator Tool (8115) for $16 with free shipping on $25+ or with Prime. Same price at Home Depot. Includes two targets and one locator.
Calculated Industries 8105 Multi Mark Drywall Cutout Tool with Locator Kit for $27 with free shipping on $25+ or with Prime.
$16 retail: $20Report