This an actual Rcf space saver set up, it is known in the states as the 'Guam ' kit as in that location a space saver is required as it is in some Gulf states where even the Lfa was required to have it, I've e-mailed the appropriate dealer parts department for part numbers and prices which no doubt will be 'prohibitively expensive, but once you get part numbers you can play around on eBay, who knows worth a try AND apparently it fits the Gsf.................
Big Rat