OP
I just looked at my amazon orders. Think I might have got them on ebay as it happens but there are several on amazon at a sensible price. Just search for 16A fast blow fuses. I went for the glass ones cos its easier to see if they've blown. I did hold it carefully over the existing fuse before soldering just to see if it powered up. It did. From memory I just left the old one in place. I have visions in a few years of having a whole ladder of fuses in there