OK the tips that are working wonders for me are from DUNU. The good news is the Jays single flange silicone tips look to be very similar with almost the same hole diameter and wall thickness but is slightly shorter (the very end of the stem is narrower though so will require more effort to go onto IEM nozzle).
Here is a picture of the tips I have tried, going left to right I have DUNU, Jays, Denon??, Sony Hybrid, original.
Note the hole size variances. Sound wise the originals are the worst sound wise for me which is likely due to all the fit issues I had. The Denon tips are next worst as they affect the mids and treble a lot for some reason, the hybrids are slightly better sound wise and are very comfortable (both of these tips will work well for anyone who struggle with sibilance and to much treble. The Jays and the DUNU's appear to be almost the same sound quality wise with the DUNU being the best by a very very small margin. Both of these tips allow the most treble and midrange sound from the IEM in this case. In my opinion neither are sibilant but both allow the most transparency and detail.