What exactly are you trying to rebuild?
If it's just gasket sets then buy proper ones from somewhere like David Silver Spares (don't buy cheap eBay crap!)
If you are taking the top end off, you may as well change the cam chain and tensioner assemblies (DSS again)
If you are in the UK, I can put you in touch with an ex-Honda mechanic who ill give you chapter and verse (and part numbers)
If you are in the USA, go look at
www.sohc4.net/forums and check the FAQs for my list of on-line suppliers.
Steve