Maybe something like this with a little filtering in front of it.
https://www.ebay.com/itm/150W-DC-DC...321?pt=LH_DefaultDomain_0&hash=item416f5a9fa1
https://www.ebay.com/itm/150W-DC-DC...321?pt=LH_DefaultDomain_0&hash=item416f5a9fa1
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