I don't believe they are available - 16T damped from a VFR Vtech I believe are ?
I've looked high and low with no luck....
But with a 18T undamped you shouldn't get as much wine as a 16 or 17 without a damped as the sprocket is larger
My Bird (03) was fitted with 17/44. Speedo indicated 109kmph at a true 100kmph. (Checked with stop watch over accurately measured 5km section.) Changed to 18t on front, now reads 1km over at 100kmph. Allowing for human error clicking the stop watch that's close enough for me. Also takes some of the snatchiness out of first gear. Apart from droping the revs slightly can't really notice anything performance wise.
Glad I read these pages.
DJblackbird.