Lowering question - do the lower links need to be modified?

[DMCNY]

You don't need new springs on the rear to lower the car, just adjustable seats on the shocks.

Do you know where these can be bought and can they be used with the stock shocks?

[stevedmc]

Do you know where these can be bought and can they be used with the stock shocks?

Almost every vendor sells rear adjustable shocks. Spax is available from Hervey and DMCH.