[walfreyydo]

Some other common oil leak locations that you may have not addressed:
Rear main seal (can look alot like oil pan gasket, change this when you do your clutch)
AOS upper/lower o rings (also can mimick oil pan gasket, often leak when adding oil to engine)
Upper/lower balance shaft housing seals (this is the seal for the entire housing for the balance shafts - lower = huge pain, best to do along with engine mounts)
Upper/lower balance shaft rear seals (you may have done the front but the rears also leak sometimes, they are allen head shaped caps)
Front/rear cam seals
Oil cooler housing seal (as TibetanT mentioned)