Well Leg ,they are around ,but expect to pay $300 -$600 U.S. for one !
They also made folding stocks for the M14 clones as well . I have both the BM59 version and the M14 version . While they do look cool and are functional,they are not very practical . I think I have 4 or 5 of the BM59 type folders. The original Beretta are the best ,they are also the most expensive . Andy in Italy had a few for $500 0r $600 NIW. Brand new but a little to rich for me ,I am just a working guy .....