Well I just replaced the 4 on my '97 Disco with plug in NTK's I bought from Amazon for about $55 each, if you have any concerns about Beck Arnley. But NTK makes most (including Land Rover) and they are just boxed with whatever logo.
For example, last year I bought Bosch for my '95 Disco and they were NTK's.
$48 is an excellent price for OBD1 sensors, where did you find them for that?
Four wheel drive allows you to get stuck
in places even more inaccessible.
62 88 Regular
67 109 6cyl NADA x2
74 Lightweight - The Antichrist
95 DI 5-speed
95 D90 5-speed
97 D1 Automatic