Norm's right. Most disc type blade carriers don't have tabs anyway but rely on clamping force to hold the plate so unless you work out why you aren't clamping hard enough a replacement plate will just tear off the lugs again. You sure you didn't lose a washer during dismantling? Or if it is a nyloc nut, it may be in need of replacement. Technically speaking Nyloc nuts are a single use item.
