Has anyone tried this https://d3.xlrs.eu?

Extremely expensive. I don't see the point of it. BTW checkout this thread on RCGroups where someone used two super cheap OrangeRX modules for a 40km+ link.
https://www.rcgroups.com/forums/showthread.php?2037442-Ultimate-LRS-40-km-APM-Telemetry-RC-link-for-54-%28using-2-OrangeRX-1W-TX%29

You could try something like that. Super cheap and useful. You'll have to do some mods though.

It's 200 km equipment not 40 btw I knew about modding hobbling txs into telems

200km I wonder what you might need that for? For most UAVs 200km is way too much. I don't think anyone needs that much range for real-life applications except professionals.

that's for professional applications.