Core wants them because they apparently work for getting you into other EA betas, am I right? And sadly, Steam has discarded mine because I don't have the beta copy of BC2 any more.
More of a mix of CoD4 and BC2 than Mw2&BC2 I got mine from Dark on the forums. The topic appears to be gone now so..
No, not that one Dark. The 1st Bad Company 2 Beta thread. Way back , last year i think.. it was in the Bad Company 2 Section of the forum - which is now gone.