Don't know about the Vivoactive but I use this thing, it's a quatix by garmin.
you can reconfigure the display,there is a larger format available than the one you can see.
As for neoprene bands these where common place decades ok when I was sailing dinghies. I haven't seen one
for at least 30 years,should be easy to make one.
If you are breaking pins you could retro fit a continuous strap that weaves under both pins- if one breaks then the other
is backup and you don't loose the whole watch.