Both of those games had official NEC phone cards. I used to think they were for pre-orders. If these are are the prizes you get from NEC, well then damn.... I have to apologize for holding this grudge for 12 years..I was expecting one with my Blue Breaker!
I've seen them both in one promotional picture together, not sure if it was on NCS or here on PCEngineFX, not too many places had stuff like that as "news" back in the day.
Couldn't find it with a quick search, let us know if you have any better luck.