I've had good luck with the Glock 10 round magazines and adding the #3 follower to them. Specifically with gen 5 magazines. I've run 147 hsts through them without issue. I know others have said they do not run and I'm not discrediting them. CT allows "registered high caps prior to 4-2013 to be loaded to 10 and carried that way. It's my solution for the time being. I'm trying at all costs to avoid a platform switch.
Following with interest.
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ETA this is with a Glock 19. My other option if it comes to it is learning to shoot a 26 well....
Edit again....I believe @PensFan has had good luck with a similar fix.