If you search on eBay for Apple Watch Assembly you can find some fairly easily. They tend to all come from China so in the UK it takes about 3-4wks to arrive. But the quality is very high and I can attest to that having used them a few times now. They're about £135 each at the moment incl delivery. You may or may not get a seperate vat bill through from customs. Depends on wether they've already met their quota ;)
Once again, for the revised Model 1030, all of these screws are T6 of varying sizes, nothing like the original. Use your favourite way of keeping track of where to return the screws in their correct holes.
On the revised Model 1030 it is all black and you will need to raise the ribbon slightly to remove it. Don’t just try to pull it backwards as there is a notched retainer.
P2 pentalobe is equivalent to a 0.8mm pentalobe. Make sure the driver is well seated into the screw head and push with enough force to prevent it slipping and either damaging the screw head or your driver.