Holy Moly, Longknife, you are right!
http://acepilots.com/vietnam/viet_aces.html
What a fascinating read. With photographs to boot.
(http://www.moodurian.com/tornado/images/mig21.jpg)
Another interesting link: The top air ace of the Vietnam war. (http://www.dailykos.com/story/2015/9/3/1405960/-The-Top-Air-Ace-of-the-Vietnam-War)
Yo Longknife. For your delectation and delight:
Mig-21Bis North Vietnamese Airforce Skin Pack.
(http://www.moodurian.com/tornado/images/NVA_Mig_Duo.jpg)
https://www.digitalcombatsimulator.com/en/files/1353353/
and
Mig-21Bis of 921st 'Sao Do'_North Vietnamese Airforce Skin Pack
(http://www.moodurian.com/tornado/images/NVA_Mig-21Bis_4324_Banking.jpeg)
http://www.lockonfiles.com/forums/topic/40598-mig-21bis-of-921st-sao-do_north-vietnamese-airforce-skin-pack/
Enjoy.
Regards
Frankie Kam