I wanted to show you the ones other manf used. They aren't elegant - the front uses a narrow steel bar to hold frunk lid open and the rear engine lid uses a pin on a chain (obviously stolen from local bank). These can be made to look ok - I suspect same drilling and grinding could be done on the steel SE one. These cast hinges don't take kindly to too much lightening before they crack. Some here have used the gas pressure shocks to hold lids open.
Another "proper" alternative might be the old 356 hinges - but it will take some work to use them. They actually have a holding latch mechanism in them.
These run from $50 up to $500 on ebay for 1 or a pair. Not sure why as they are not a rare part but they came from a PORSCHE.
https://www.ebay.com/i/2642780...128597f033b7b1993be4