my shop uses mobilesentrix for parts. for the 3a there’s two parts available, refurb and premium. refurbs are gonna OEM displays that have had the glass replaced and Premium is OEM quality. I’ve done the 3a, 3a xl, 4, 4a, 6, and 6 pro using both refurb and premium and they’ve all worked perfectly. if you have a local shop you could have them order the display for you and pay for it, however since it’s a bare screen you won’t have any warranty after you adhere it down.