This is something that comes to mind, for me.
1. Use a truck pan.
2. Install a flat plate, angled from the top of the right side, to just above the oil level on the left.
3. Seal that plate around the oil pump, as well as possible.
4. Install waffled or corrigated, small mesh screening, on the plate, inline with the engine, to direct the oil, to the back of the crankcase. Leave about a 2-3 sq in area at the lower rear corner, for the return.
That way the oil will have a long path, flowing away from the pump, with the screen to separate the air from it and the longest path back to the pump pick up.