These are a one for one replacement of currently offered products.
Bryant watertight plugs and connectors start at $15.50 (BRY14W47)
Heavy duty duplex straight blade receptacles start at $10.00 (BRY5262GRY)
The enclosure ratings 6, 6P & IP67 for watertight plugs and watertight connectors are only intended to demonstrate superior resistance to water ingress and not for prolonged submersion.
Bryant Watertight Wiring Devices