Yes the zero limits stuff is built to order, I think they say 40 days but it's more like 8 - 10 weeks. I bough the infills last year and I think they were around £80 the pair, possibly a little more. There is a German firm on eBay that does them much quicker but they cost a lot more.For the infills you need to add your own foam pieces to stop vibration, I also use a soft washer between the carbon and the bracket,
You mention headshake. TBH that is almost unheard of on the fazer at almost any speed( I never had had this issue in 10 yrs of riding). I suspect the sat nav mount onto one side of handlebars could be your issue. It takes very little to wobble a bike if you touch the tiller ! I put mine in the very middle of the bars to avoid this issue. A very clean bike for sure...does it ever get ridden ! ......not bad for a bike which aint been made for the last 8 yrs or so....