CEM3340 VCO (&SN76477)

[Hcabnivek]

I'm looking to build 2 to 4 vco's and am hoping to go the easy route and just
buy the fancy chips.  The best price that I have found for the Curtis VCO chip
CEM3340 is $35 plus shipping.  Does this sound like a good deal, or does
anyone know of someplace to get them for cheaper? 
Also, does anyone know where I can get the long gone SN76477 complex noise
chip by texas inst.?   Short of that, does anyone know what old video games
etc. deffinitely have this chip in them?
thanks in advance,
Kevin

Cross posted on Synth-DIY and Anologue Heaven