i would try a wrecking yard or a auto parts recyclers, you obviously still have abs working it just the sensors malfunctioning, i actually disconnected my abs, i prefer not to have it, if you have a clear understanding of the risk of locking up while braking just remove the fuse for the abs in your fuse box and the abs won't work and it will remove the abs warning light too...
but if you want it and don't want the warning light try a wrecking yard or a auto parts recycler...