I actually gone and bought a whole roll of flashing ($$$

) and I've made cuts for my B4 and B44. I can do some cuts and sell them but have no idea what to charge. £5+postage/car? I'll make them bigger thane needed so you can do your own trimming. PM me if interested.
The one in my B4 is pretty much spot on 125gr and is nice and flat sitting under the battery so the weight is nice and low.