On my Mk2 I use to have a Raid HP rear strut brace from a Polo 6N, it had adjustable threads so you could alter the length a bit to!
Worth a look out for it.
Just looked on the link above, basically the same as I had but with a raid hp
sticker lol..... anyway remove the retaining plate on top of the bushes and adjust the strut brace to align with the suspension struts, you don't need that retaining plate no more. Put the nut back on to bolt down the brace, I then slightly made the strut brace longer only by a few turns.