That might be the right gearbox Alan, however the pics are a tad blurry and no close up of the ID label to know for sure. I don't suppose you happen to know what box you have at the moment?
If you have a look at this thread, i know Luke (360beast) has a few autoboxes available :
https://www.volvoforums.org.uk/showthread.php?t=287440
I doubt they'll sell quickly and i suspect he may have more in the future so worth making contact.
As a general rule of thumb, updating one autobox for another is easier than doing a manual conversion. It's not just the gearbox you have to change, the flywheel, clutch, sometimes the starter motor, pedal box (to gain a clutch pedal), centre console, gearlever (obviously!
) and a few other bits i'm sure i've forgotten.
It's not impossible but the other thing to consider is the character of the car - does it suit an auto box? Do you do much town driving? If the answer is yes to both of those then i'd suggest updating the auto - if you don't do much town driving and you feel as if the character of the car would suit a manual as well as an auto, then go for a manual conversion.