Have a look at PowerFlarmFusion. Much, much better/reliable than any other EC system but not cheap.The best never is!
Direct aircraft to aircraft, no ground stations needed. Will give you Flarm in and out +Mode S in and out. Also ADSB in to compliment the ADSB I assume you have with your Transponder.
No subscriptions ..Ever! Once you have purchased, that's it.
An added benefit also is that there will no no extra subscrition to see Flarm on Skydemon/EasyVfr or whatever system you use unlike other EC systems.