Defender TD5 Throttle controller, it's there such a thing?

[R1CHY_RICH]

When driving on soft sand my 2006 Defender TD5 struggles, the internet suggests an aftermarket "Throttle controller" (something like this ultimate9.co (https://ultimate9.co) ) would be a cheap and easy way to help keep in a good power range. Has anyone tried a mod like this or something similar? I can't seem to find one that fits!

[Tombie]

What year is yours? With an NNN ecu it’s easy to remap the throttle profile.

If you’re struggling in sand I’d say your pressures are wrong - td5s love sand work