Are these the right drop links?

Hi everyone, I have a MK1 Octavia vrs, and I'm about to buy the pro-sport coilovers. I understand that I will need merc vito droplinks (W638 I believe), had a look on ebay for some and I'm confused as to which ones I actually need. I thought I needed 250mm in length, but I've seen some at 230, 260, and 280mm aswell, all to fit a w638 vito. After more searching on here I found a thread mentioning some older vito droplinks are m12 thread as needed, while some are m10. I've done  a lot of searching through here but most of the posts are old and the links no longer work. does anyone have a current link to the ones that I need and will fit. Here are some I've seen...

http://www.ebay.co.uk/itm/MERCEDES-VITO-108D-113-V-CLASS-W638-V230-V280-2-FRONT-ANTI-ROLL-BAR-LINKS-280MM-/301244114905?pt=LH_DefaultDomain_3&hash=item46238c67d9

http://www.ebay.co.uk/itm/MERCEDES-VITO-CDI-96-03-FRONT-PAIR-STABILISER-ANTI-ROLL-BAR-DROP-LINK-x-2-/301662881418?pt=LH_DefaultDomain_3&fits=Model%3AVito&hash=item463c82468a

http://www.ebay.co.uk/itm/MERCEDES-VITO-NON-CDI-96-03-FRONT-PAIR-STABILISER-ANTI-ROLL-BAR-DROP-LINK-x-2-/301637852867?pt=LH_DefaultDomain_3&fits=Model%3AVito&hash=item463b045ec3

Thanks for any help.