Distributor issues (2)

That looks like a Bakelite part, and could also be drawn up in Fusion for 3D printing. But there may be an alt:

JS397 appears to be an alt number

https://www.ebay.com/itm/Jaguar-E-Type-V12-XJ12-S1-distributor-electronic-ignition-pickup-bracket-JS397-/184513011349

~Paul K