Gasket kit for 1978 KZ 1000 engine

Hello I will be needing a top end gasket kit for and engine i will be doing and I wonder which is the best kit you guys can recommend, especially as sometimes not OEM Valve seals can be an issue if are not the good quality ones. or should I buy the gasket set and separate high quality valve seals, and if so which ones, Sorry but I have been out the game since the age that OEM part were easy to purchase.
Thanks for your time it means a lot

There is a member here that sells viton valve stem seals. Other than those the OEM gaskets and seals are superior to aftermarket in my experience.

Thanks.
Do you happen to know where to find the OEM if it can be sourced this days, Been out the game for a while.

Any Kawasaki dealer can access OEM parts. Or you can order from Partzilla.

www.partzilla.com/catalog/kawasaki/motorcycle/1978

Once you get the part numbers from Partzilla or similar, you might want to plug them in at ebay to see if you can find a discount. Sometimes you get lucky...

Edit: found the guy with the viton seals... kzrider.com/kunena/profile/18962-dfigpz

Thanks I actually found them in partzilla, I guess standard price but in eBay people is asking crazy money. Thanks you guys are been great help.

We have Viton seals