I've just bought K3v ha's car a.k.a DOO's old beast

and i'm VERY happy with it, but theres a couple of minor gripes.
1. going slow in 1st gear, tckling speed bumps etc, the engine/box clunks abit, as if a mounts gone. is this the case and if so, are uprated mounts available to buy?
2. when reversing, with a bit of right lock, the offside rear disk vibrates rather loudly, as if its binding only does it in reverse though. A simple case of the caliper sticking slightly?
thanks ppl