My experience ( with several units from the 70s and 80s--Yamaha, Marantz, HK, Sherwood, Akai ) is that very few receivers have the kind of dual outputs you are looking for... I haven't seen even one. Someone else here with more experience may be able to give you a name, though.
One alternative solution which is sometimes proposed is to buy a second amp ( or a second receiver ) for the remote speaker pair, and run an interconnect from the tape outs of one to the tape ( or aux ) ins of the other. There is a risk of hum with very long wiring runs, so well-shielded wire is a useful precaution, but a few setups I know of have worked this way.
One alternative solution which is sometimes proposed is to buy a second amp ( or a second receiver ) for the remote speaker pair, and run an interconnect from the tape outs of one to the tape ( or aux ) ins of the other. There is a risk of hum with very long wiring runs, so well-shielded wire is a useful precaution, but a few setups I know of have worked this way.