32-52 Flathead to Ford T5 Adapter plate - Modern Driveline
1955 and later chevrolet passenger T5 transmission adapter
E-Simpo® 50-Pack CFL T8 to T5 Fluorescent Tube Side Cap Adapter,T8-T5 Tube Side Cap Converter, Allow You Install T5 28W CFL into T8 Fixture (L31 for 2ft/465mm T5 Tube) - - Amazon.com
10pcs T5 to T8 Socket Base LED Adapter Holder Light Bulb Lamp Tube Fit Converter | eBay