Car Audio Direct.. will be getting it over the weekend me thinks! £79.99 from them directly or ebay too ... a bulk pack! Compared to Dynamat Xtreme at £150 ish... I've never used either so don't know what to expect but haven't heard bad things about either... It's effectively the same thing I hear but you're just paying for the brand with Dynamat...I'm sure MEGA will be along soon to give you his experience and thoughts on Dynamat as he had used it extensively in his previous E90.
JL Bass Control Knob bought!