Maybe I misunderstood you, but http://www.cypherpunks.ru/gost/enVKO.html VKO 34.10-2001 is ECDH analogue. It uses two 256 or 512-bit elliptic curves keypairs for deriving common shared 256-bit key. It is Diffie-Hellman, like curve25519, with at least 128-bit security margin.

http://www.cypherpunks.ru/gost/en3410.html GOST R 34.10-2001/2012 are digital signatures based on elliptic curves. Just like ECDSA.