I might’ve settled for the .276 Pedersen (or its FN near-match, the 7mm x 49 originally developed for the FAL) in a FAL package. (Can’t help it...I’m a confirmed FALophile!)
Recently I was surprised to learn how many of the EM prototypes are still around...some in private collections, even. For a long time I’d believed the only surviving EM prototype was the one in the Lithgow Arsenal museum in Australia...it had been loaned to the Aussies in the 50s, and they conveniently “failed” to return it.