Has anybody found a suitable method or can suggest a way to repair the commonly broken plastic clip on the upper inside side fairings where they meet the nose cone plastic?
From this description it sounds like you are describing a 1098/1198 fairing if so I used JB weld for plastic, it's lasted 10k plus (you've posted in the 916 etc section)
It is off a 916 and the moulded clip that aligns the side panel to the nose cone plastic in between the Dzus fasteners
I think @Martyn Edwards is referring to the little plastic hooks that allow a smooth alignment between the upper fairings and the nose fairing on each side. Pretty fragile that one and requires full attention when putting the fairings back on.
Check out baking powder and super glue repairs on youtube - might be of use. I have used it in the past and it is very strong. You can shape it with metal working tools if required.
I've had some success using this stuff, just needs to be left for 24hrs to set properly, no idea where their 15 min claims come from! https://www.amazon.co.uk/dp/B01IBOK7FE?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1
Plus 1 for JB Weld. I’ve tried superglue and baking soda too but found that it does fail after a short while.