Solid Mount Anchor Kit (Fiberglass Showers/Tubs) - GrabBars.com
Lag bolt stripped out fiberglass. How to fix? - Offshoreonly.com
Hillman 1/4 in. Pull Toggle (6-Pack) 377610 - The Home Depot
Amazon.com: Toggle Anchor Bolts, Hollow Wall Anchors 304 Stainless Steel Scissors Type Heavy Duty X Anchor M8x150mm, Pack of 4 : Industrial & Scientific
Amazon.com: TOGGLER SNAPTOGGLE Drywall Anchor with Included Bolts for 1/4-20 Fastener Size; Holds up to 265 pounds Each in 1/2-in Drywall by TOGGLER (20 Pack) : Industrial & Scientific
Amazon.com: Toggle Anchor Bolts, Hollow Wall Anchors 304 Stainless Steel Scissors Type Heavy Duty X Anchor M8x110mm, Pack of 4 : Industrial & Scientific