The Caped Crusader

I'm sure this driveshaft has an o-ring on the end, NOT a circlip. 

You can see the length of brake line and where it goes on the PET2 catalogue. If it's very long, there may be a lot of dismantling involved to get the pipe to its destination. 

It'll be much easier to make your own cupro nickel repair section and repair it at the break. 

I would just buy a new half shaft from Porsche. That way you can be sure it's OK. 

Also, if you have a look at the Design911 website, they have essentially the PET2 (dealer Porsche parts catalogue with diagrams) on it. 

I have the full version at home so if you're needing part numbers and prices, let me know. 

Looking at the damage and the the error messages, they would be commensurate with the damage. Looks like a great project. Priority would be to get it onto its wheels. If you were closer, I'd happily help you with it. 

The last of the 987s had filters fitted on top of the holes at the softop area. I retro-fitted them to my car years ago and also fitted them to a friend's newly acquired 987 last week. They were around £5 per side, including VAT from the OPC. 

To my mind, they're a no-brainer!

http://parr-uk.co.uk/product/porsche-boxster-drain-hole-filter/