You have the smae problem as i do. I have replaced the 'T' seals and crankshaft seal in the clutch housing but ignorantly did not apply the sealant between the clutch housing and the block.
So, once again i will be taking the engine out, but i suppose you learn from your mistakes.
I would recommend buying genuine parts as aftermarket parts are not of the same quality, and if a job is worth doing, its worth doing properly!
Good luck.