Clois, that is bad luck.
I have been racing cars for 15 years, and have had various run bearings, etc over that time in different cars.
In your case the only fool proof solution is to dry sump the engine. I have a race big block Cobra (Chev powered tho) with dry sump, and you can push it as hard as you like in corners, braking etc, and be assured that the
oil supply never gets a problem.
All proper race cars tend to have dry sump systems - there has got to be a good reason for it eh? With FEs having oiling problems, it would certainly be a good insurance on your engine. (I am surprised the engine builder covers your motor for racing)
If the cost of a dry-sump is too much, there are the
oil pressure devices that could be worth a try, these hold a certain supply of
oil that regulates the pressure in cases of oil surge.
Good luck in getting your car on the road again.
Cheers