BaggedE30,
I can recommend a mod here.I have rallied a Williams engined Clio for the last 5/6 years.I got an engineering workshop,to remove the old rubber type bush,in the "dogbone" mount.Replace it with one of nylon,with a steel insert ~~ definitely stops a lot of the gearbox rocking.It cost me about £10 ~~ cheaper than a new one.If you are want one doing,and are struggling to get it done,send me the mount and I will sort it for you.