Leviton 8300-R 20-Amp, 125-Volt, Extra Heavy Duty Hospital Grade, Duplex Receptacle, Straight Blade, Self Grounding, Red $1.99 + FS w/Prime @ Amazon

[ctgolfer]

Interlocking Thermoplastic Nylon Cover and Body
Nickel- Plated Brass Strap with Integral Ground Contacts
15-20 Amp Duplex & Single Configurations Available
Permanent “Green Dot” Marked on Face. Total Outlet: 2
Exclusive V-shaped, serrated back-wiring clamps for superior contact

https://www.amazon.com/Leviton-8300-R-125-Volt-Receptacle-Grounding/dp/B002090BBC/?tag=phtwllt-20

[CtCarl]

$12.19 and up now.