XL600V Rear Shock Problem
 

Just taken bike for MOT. Not sure how it passed last one with previous owner since a Fair few things wrong but the garage will keep it to repair bits for MOT.

BUT it appears it has the wrong Rear shock absorber. The previous owner fitted a Hagon shock absorber but apparently it's WAY to short (Which explains why its a pain to put on center stand) so there is do play in rear suspension. So i need to fit a standard one and wandered if any of these would fit:

http://cgi.ebay.com.au/Honda-XLV600-...L080808121a844

OR

http://cgi.ebay.co.uk/Honda-XL600-XL...3286.m20.l1116

OR

http://cgi.ebay.co.uk/New-Low-Cost-S...808201915r1857

Or should i buy new? Also is there any other Rear shock thay would fit?