Your best bet is to gunk the engine then give it a good steam clean, just do it on a day when you dont intend to use the car as it wont want to run to well for a while after, let it stand up and dry out.
Then hopefully you'll find the leak easier.
I know how much of a pain it is when your car keeps leaking oil. I've done the dizzy, sump gasket, cam gasket and still have an oil leak on the bell housing which I have diagnosed as a crank main seal gone, oh well gearbox out again.
Good luck with it.