Nathan...
I,ve done similar, used a carpet tile ( I know it sounds yuck

), scored a bend line into it & used velcro to attach it to the back of the dash panel & to the top rail of the chassis, it does the job but being honest...I don,t like it .
Yes of course you can pop over for the stamp set, the box is still in my car( daily driver) from the other day when I missed you, let me know when would be good for you
Deezee....
sounds similar to what I,ve done in the placement, but with a carpet tile as I was thinking "no sharp edges" etc ....mine just seems a bit naff
I,ll have a go at making it better somehow
cheers
andy