hi
personally own a gap iid which will do everything including suspension recalibration and also update the compressor
older discos had the hitachi , newer ones had the amk, so if u go from an hitachi to an amk u do a software update which the gap iid will do
alas there around £420 Sterling uk, but will pay for themselves very quickly , will be like having access to a dealers capability in ur own hands
if u replace like for like u don’t have to reprogram anything , they will normally come with a new relay
here’s the link for the gap iid , plus there after sales is second to none , here’s a link for u , if u scroll down and add ur model u can see what it can do, plus of course read fault codes, reset them and live data
https://www.gap-diagnostic.com/products/iidtool/
also there contact page , just in case there’s something different and to be 100% sure
https://www.gap-diagnostic.com/support/contact/
seat covers I bought ones from Inka, they fit extremely well , alas not sure if they shop to aus
https://www.inkacorp.com/
please be very careful as there are plenty of fakes around of hitachi and amk , here in the uk a genuine amk kit are around £500 Sterling
this company is very good
https://www.advancedfactors.co.uk/steering--suspension-98-c.asp
hope the above helps