240V 3P Delta to 208V 3P Wye

I have a customer that has a piece of equipment that runs on 208V 3P, but the power to the building is 240V 3P with a Delta High Leg
Is there a good way to convert the 240V high leg to 208V 3P Wye?
The equipment only pulls 20A, so I was thinking of a small buck boost XFMR.
 
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