Hi mate,
You can get AVO which are slightly cheaper or leda which are more exspensive, i am led to beleive that the Leda's need the rear suspension turrets modding quite a bit (all relative) and that the AVO units bolt in, they are however i am led to beleive slightly infieriour units but again relative
Ledas you can get from Mike Rainbow and i am sure he could also get you AVO's but you could also contact them direct
Hope that helps
Mike