Presume he needs to get to ferry tonight though so GSF too late? Why wasn't this checked before, why suddenly leaking? You sure you don't just need rocker cover gaskets?
If the worst happens call me and I'll trailer it to Harwich, don't much fancy the overnight trip but the offer is there if you're desperate.
Lets see what the evening brings if anyones about that has some. Failing that Ive some panel hammers and sealant and The monkster has a vice.
Just thinking outside the box but if he's quite close to you fit yours to his, his to yours, you drive home with oil *******ing out the back but get it fixed tomorrow. Assuming you don't have to go to Sweden. I'm all seriousness though, if the rocker covers are 'bent' to the point where the engine is spewing its oil and it can't be fixed I'd suggest the problem is greater than some bent covers. Sounds like another dodgy seller out there though? I thought Clive was paying mega bucks for his bus from the UK?
Will sort something out but best fix is to get some tonight and fit in the morning Im thinking. Always start with the ideal outcome and work back!