Sabre, some tricks for you:
HLAs - you can purchase aftermarket ones for around $25 each. They are definitely worth buying new. Try asking an engine reconditioning shop around your area. (I think I have a full set of solids brand new somewhere, must find them!)
Gaskets: You can also buy an aftermarket non-ACL gasket kit for a couple a hunge less than an ACL but I would buy the ACL or purchase the head and intake/exhaust gaskets seperately and cut the rest yourself.
Oil Pump: that's definitely the thing you want to buy new from mazda
Sump: Try Mania, they had one last time I was there (which was a little while ago)
Engine Bearings: Purchase ACL Race series mains and rod bearings. They are better at oiling than OEM ones.
Welsh Plugs: new ones are cheap as chips just not from Mazda.
Remember the Laser/323/Astinas/GTX and Sportages all used variants of BP motors so shop around.
Engine Mounts - Corksport in the US do the mazdaspeed HD ones cheaper than anyone. No cups though...
99 Head = rocking horse poo = good frickin luck! (You'll also need an intake manifold remember!)
That's about all I've got for you.
