I’m not familiar with their sound, but based on design characteristics and descriptions, I’d imagine Nordstrand Big Singles or Big Splits would be close.
Or ask Bartolini if they’d make a custom set in the right soapbar size. You also might be able to make something custom yourself, perhaps even as simple as fitting the J pickups inside empty soapbar shells, tho I imagine the screw holes/tabs might need to be trimmed…