Need help for a broken rubber strap

Need help for a broken strap. I can't believe this has happen to my wife watch. The rubber strap give way after putting on. Can anyone advise me where can change the rubber strap or can it be mounted with 3rd party strap?

Not easy Bro, remember.I got a favourite Adidas running watch also. Rubber broke.. then no replacement. These watch after a while there stop producing not easy to find parts..

my advice is just buy a new watch...

Or perhaps a Zulu strap? I'm not really familiar with the strap attachment on this, but would expect it uses springbars or some such which could do this. It might not look good in the end, but Zulu's aren't all that expensive so if she instead wants a new watch you wouldn't have put too much into 'fixing' this.

It on spring bar but gap is very small to mount a strap in.

K2 might have compatible straps for this Adidas