How do I attach a handrail to stone steps, or another idea?

We are told that the stone pavers will crack if a base plate is attached. While it may withstand one drill hole, four of them close together would crack the stone. Before installing the stone pavers, the base was constructed of brick and concrete blocks. We can't assume anything solid is under the pavers (Might hit airspace right where we need it to be solid, albeit small.) We have to have a 36" handrail on at least one side to pass inspection. Thank you!
q how do i attach a handrail to stone steps or another idea
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