Recently I purchased a new screen for the ST13 and rather than pay for a genuine Honda screen went to Handcraft Fibreglass of Seven Hills (Sydney)
http://www.handcraftfibreglass.com.au and got one for $190.00.
Same thickness as the original, and no sign of it moving around fully extended
I had the option of standard height, 50 mm higher or 100 mm higher and if it didn't suit, they'd cut it down for me. I opted for the highest. (Easier to cut down than add more on

)
Since I've had it on, I've found the extra height to be a boon. No pressure behind the head and exceptionally easy to look through while riding (I'd always found it difficult looking
through the screen on corners).
Even though it's higher, I can still get good air on hot days with it down.

