i bought an entire set, whcih includes the T5 and T6 size (T6 is what my screws are, not T5 as most people say). i got the whole set for 6 bucks from lowes or home depot. it was buried in the isle with screw drives and hard to find, but they definitely have them there. might wanna grab a scalpel and black tape too, total was 12 bucks.
i was thinkin of starting a slider fixing on the side business. its so easy, and the end result is so much better with solid slider. sorry i'm in socal.
bongowireless.com, they'll do it and even give u a loaner phone when urs is in repairs, they fixed by 6270 back in the day...very professional, just sorta $$$ too