I just went through three months of hell with this. My original windscreen was too small and had leaked for years prior to my ownership, rusting out floors etc which took months to fit. There is a thread here showing the various sizes in glass available through the various suppliers.
I ended up purchasing the rubber via Roland Jaekel in Germany and had an Ozzie company make the screen for me as to get a Wilkinson screen here was going to be over $2k with transport etc.
Do a search for windscreen rubber and you will see the spreadsheet I did on various available sizes.
The rubber from Germany is amazing quality. Highly recomended.
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