My strap has finally disintegrated after nearly 3 years of constant use. Any tips on getting a new strap? Is it a standard size and type or do I need to go to Junghans?
I'd get an original Junghans strap.
Depending on where you live, there are some watch sites where you can order them.
The original strap is made to follow exactly the curves of the case, a standard strap will never fit properly unless you do some cutting and/or sewing.
But because you'll face this problem again in 3 years I'd go for a steel bracelet anyway