Stereo pre-amps with dual outs for bi-amping and a subwoofer line out


Do they exist? Maybe I’m looking in the wrong places, but I haven’t seen any. 

Definitely not looking for an integrated or AV Receiver.
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Yes ...however, better sound can be had using only one pair of preamp out connections.   Listen carefully and  hear a smaller soundstage and less dynamic contrast.  Also using 1 amp of a higher quality  is better than bi-amping otherwise.
If you like tubes the PrimaLuna Dialogue Premium has extra pre -outs. I have a couple of subs hooked up this way but used to use an audioquest splitter on my last preamp with the same results. 
If the outputs are just jumpered at the preamp is there really any reason to bi amp. I can see it in a fully active system with external crossovers. I had a 3 amp Linn System like that and heard the difference. I can never really  say I have heard a difference with bi amping. Put the money into one better amp.