Hi guys, new to the site. Got a Lotus Carlton replica that is getting a Z20LET lump with large turbo. I decided to use an R25-28 from a V6 Omega and am having a bit of a headache with the clutch pipes. Im sure one of you manual boys will know exactly what I need.

First off I will start at the gearbox end of the line, got the slave cylinder with its bleed pipe in place, I bought the slave cylinder feed from Vauxhall (item '12'):

As you can see the bottom of item 12 has a standard screw-in union which in this case screws into the slave cylinder itself, however the top end on the flexi has some kind of push-fit union 

The master cylinder I am using has the usual screw-in union too, so what I would like from you guys is to know which bit of pipe I need to join the push-in union to the master cylinders screw-in one.

EPC is pretty useless with the pictures being vague at best, so I went on ebay on found these:
http://cgi.ebay.co.uk/VAUXHALL-OPEL-OMEGA-MANUAL-CLUTCH-HYDRAULIC-FLEXI-PIPE-/31...
http://cgi.ebay.co.uk/VAUXHALL-OPEL-OMEGA-MANUAL-CLUTCH-HYDRAULIC-PIPE-/31024869...
http://cgi.ebay.co.uk/VAUXHALL-OPEL-OMEGA-MANUAL-CLUTCH-HYDRAULIC-PIPE-/35024523...

Anyone know which one I need? I called up the guy on ebay who breaks omegas and he was pretty unhelpful so I am relying on you guys to steer me in the right direction.

Many thanks 

Yep.
You also need the spring clip that holds the joint together.

Why didnt you just get the bits form a breaker?

what you need is....

the concentric slave cylinder.
a clutch pipe - prefereably one made for you in copper
and the master cylinder.

if you make sure that the pipe has a good few coils in the middle, then there's no need for a flexy or any of the joints, either push-fit or not. If you don't believe me then just look at a Golf or Corrado.

I'm sure it'll work, but have never tried it myself - the only potential sticking point might be incompatibility between the master cylinder and the slacve cylinder effective bore.