Stefanos, the clutch cover gasket is different between the mc18 & mc16. Just about everything else fits though.
Daz, a genuine set ain't that much dearer, you just gotta order all gaskets individually. But there are only 6 in the complete engine, 2xBase, 2xHead, 1x Clutch, 1x waterpump.
Use the (very useful) 'Parts Manual' section of this site to get the part numbers, then order through wither Lings Honda, or Dave Silvers.
If you don't mind a wait, Tyga will supply genuine gaskets but there is usually around a 1 week wait to the UK.
Paul
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More **** two strokes than you can shake a **** stick at.