|To fix it the motherboard needs to be removed, the old holder desoldered and then a new one soldered in.|
Any cmos battery holder shoiuld work as long as its solder contacts have the same spacing and it physically fits in the old location.
I googled cmos battery holder and this is the first link that came up:
I imagine if you go to the support page for you model you may be able to find a parts list that'd show an exact replacement. But really, all you need is one that fits in the same space.
You're not really green until you're soylent green.