Thinking of this version
Ah ok. When you read up on that it is actually "This is a modernization of the MiG-21SM. Demo with Bortnumber 44 at Moscow airshow 1992 . Predecessor is the MiG-21-93 bison. The unofficial name is MiG-21-92".
The real MiG-21K (well the version that was a competitor to the Su-25), was the Ogival winged version I posted above. You can read about it in here:
That said, still looking forward to what you create. All is good in Whiffverse.