Silva still don't have S10's or S15's in stock. I bought the S15 because I intended originally to fit the navtex aerial but could never get hold of one. Since I don't use it and I can't get a replacement S15 for my broken one yet they have agreed to give me an S10 and an S12 handheld instead, at least the handheld is in stock and I will be able to get out with some sort of radio.
They seem to have massive supply problems, i coldn't get an S15 for nearly two months when I first ordered and never did get the Navtex aerial. I have now been waiting nearly three weeks for the replacement for my S15 which gave up the ghost after 4 months use.