I think you are looking at the wrong things. They are not just adapters.

Get this cable -

https://hartaudiocables.com/collections/sennheiser/products/hc-13-dual-lemo-push-pull-utopia-balanced-headphone-cable

And you can choose the interconnect you want..

Interconnects -

https://hartaudiocables.com/collections/interconnects

It's the most versatile cable as you can swap the interconnect to any termination you want without having to rebuy a whole new cable.

If you need a longer cable you will have to try to get one during the days they have custom cable sales open (2-3 times a week at various times).