Hi Steve
I have used the Gasket shop on Ebay a fair few times, never had any crap gear & have had good service.
Head Set
Bottom end set
All oil seals are included in those Two sets & he will almost certainly have the head bolts if you wish to change those too
You may as well change the core plugs whilst you are at it ( Bound to be rusty on the inside & will give you a chance to clear the waterways a bit better )
Core plug set
He is quite happy to combine postage to save on cost
Hope that is of some help