I've had a PM from Allan about a refurb latch - though I'm waiting on my core units for the RHF version he needs to come back so I can finish building one up and ship it out.
There were 3 different latches used on the front doors across the years.
First version was about 95-97 and had the moulded 6+1 connector on the latch itself.
Version 2 was 97-99/00 ish and had a loom coming out of it and ended up in a 6+1 connector. There are also 2 different versions of these - one with a moulded connector with 3 pins for the motors, and then 4 wires coming from the microswitches, and the second version with all 7 wires coming out of the latch housing.
Version 3 was the 99/00 - 02/Runout version which was the same internally as Version 2 - but had all the 7 wires in one connector, rather than the 6+1 arrangement
Passenger latches were the same - but omitted the key switch (except on LHD where the key switch was in the LHF latch and omitted from the RHF), and the rear doors... well, there are 4 different versions for each side...
I've got them all listed up on my website: p38webshop.co.uk - whether I have them in stock or not. I made it so it keeps them all in order and makes it easier for me to see what I have available. I have pictures of all the various versions that I have rebuilt - and as I find new ones, I update the product pages. I also have all the VIN ranges there for each latch type, collated from the helpful Allbrit.de online parts catalogue.
Superlocking... You can remove the motor if you want, or just cut the wire that feeds it (I leave the physical motor in place, but then cut one of the power feeds to it, as if the motor has failed then it can cause issues with the CDL motor). I don't however recommend removing the superlocking pawl that the motor activates, as by default this is sprung to stop the mechanism in the standard 'lock' position. If it were removed, then it the lock would go all the way to 'superlock' every time as it has nothing there to stop it.
There are versions of MG latch which are the same, yes - but I couldn't tell you which ones they are as I've never been out hunting for them. One thing worth doing if you do buy a second hand door latch from a breaker (and the big reason I started rebuilding them) then test the microswitches BEFORE installing it... Most breakers sell them as 'tested' but to a lot of them 'tested' means that it goes 'clunk' and locks/unlocks when it's in the vehicle. That doesn't mean all the switches work, and I've had a few owners come to me now with 'tested' second hand units that don't work, because one of the microswitches is faulty and hasn't sorted their problem out.
Marty