Stripped bolt, no access. Need you knowledge

[wawa]

Hi all,
My 2000 Boxster S have 150k km on the clock and I dont think it received good maintenance care before. Spark plug are original so I decieded to change them with spark tube. The problem is on the driver side, the top bolt of the last coil pack is stipped. I am unable to work my way between the frame and the engine from under to have access to the bolt. I can clearly see the bolt from the top but need to remove the air box to have access. And from what I know, you need to remove the driver side intake to remove the air box. So.... I dont feel like dismantling the whole engine just to have access to à stripped coil bolt.

Any help, tips from you guys that have done it all?

Thanks
Chris