Gasket is paper on the dizzy, but... Get proper gasket paper, or you may be able to buy this one seperatly (doubt it). Before you take the dizzy out, mark it, the remove the dizzy s l o w l y and mark it again, as the internals twist as the feed and drive gears pass each other, making it a bit of an arse to get back into place first time. Also it being a paper gasket, it is very fragile, and does not like the dizzy being pulled in and out of the hole.
(Hint) Take the dizzy cap off, wind the engine over until the rotor arm is pointing to the little cut out in the dizzy body, this should be TDC, the mark is about 1PM on the body.
Check the breather seals on the front of the block, next to the dizzy housing, also the oil cooler can leak if the locknut is not tight (above the oil filter)
Buy a load of TFR (traffic film remover) stick it in a pump bottle, drive to jet wash, spray engine, leave a few minutes, jetwash off, volia, super clean engine that makes oil leaks easy (ier) to trace.
I am not bored at the moment, not at all, sorry for the long reply
Cheers
kraM