Where can I find Rear Right Self Levelling Shock Absorber my 2000 SF5? H E L P!

[Parts Subaru Forester SF5]

Does anybody know where I can find a rear right self levelling shock absorber for my SF5 year 2000 I believe.  I can't find one anywhere?  Please H E L P!  Many thanks Pauline

[Dr. Acula]

I do have a set (full set front and rear) suspension(shocks and springs) from an SG5 in perfect condition. If you can find out if it fits(and you get rid of the self leveling issues) it's all yours.

Just have to pick it up (south Cambridge area)