Wow I'm shocked (Pun not intended) your having so much trouble getting rear shocks :(
I would have thought you would get some easy for the age of the car. And I know wen I have had tried before emailing people on ebay that break car's, unless there a breakers business never got a reply so its not just you. Unless they don't like either of us ;)
And I would rather have a guy tell me they was leaking then try pull a fast one, like one guy did with me :( but risk's you take I guess.
If I get chance will see if I can find any for you tomorrow. I have an easy day so might help me kill sometime while I'm looking for a four wheel drive Jag. Don't ask lol :D
And not an easy job but might be quicker to replace the springs. and by the sound's of it cheaper. But see what I can turn up tomorrow if anything.