We don't 'sell' parts as a provider/vendor but members do sell individual used parts. There's a thread on here about online parts suppliers that they have personally bought cylinder heads from which is helpful as it'll let you know in advance what you're getting yourself into and how much etc. The 2.6 engine is the 'G54B' Astron made by Mitsubishi and there are 2 generations of engine. Be warned that the manifolds and valve cover do not swap between the 2 types due to different bolt patterns and the roof height of the valve covers (they swap one way only and the rockers can strike the inside of the cover)