On the V6 lump it is hardly ever the belt which goes but the tensioners which fail so before you do any work you need to see how far the belt has slipped. For this you need the locking kit, dont beleive anyone who tells you that it can be changed without.
Also, what evidence do you have to support that it's the belt? If it has slipped enough to cause the engine to conk out then I fear that the damage to the the heads is already done. But without proper investigation you cant know for sure.
There are many reasons for the V6 to suddenly stop, the crank sensor is notorious. Also to take in to consideration is the age and milage of the current belt and tensioners, if over 40k then they need to be changed ASAP regardless of the cause of the fault.
I am sure there is a member in the area who can help you who has the locking kit and a modicum of ability with Omegas. 3 pop in to mind straight off the bat in fact. But there is a lack of OOF mobile mechanics in your area. I have covered it a few times when people are reeally in need but I dont do it regularly.
In short, you need to be sure it is the cambelt before going through with a cambelt change, but even so if the cambelt is ok but over the 4 year/40k mark then it needs changing along with the tensioners and with the correct tools.