Hello, I ran into some troublesome ebay auction now here comes the hard part: SSM2014 VCA - 3 pcs SSM2044 vcf - 4 pcs MN3004N BBD - 9 pcs TDA2104 BBD - 3 pcs NE5532-4 Signetics - lot pcs PCM56p - DAC - 10pcs if you need these you already know what they are for. MN3004N is equivalent to 3004 but low noise version. These were used in Roland vocoder plus, system 700, and countless others I don know bout. Signetics 5532 is said to be the best of the "bunch". Make an offer!! Im also looking for ceramic or plain NE5537 sample & hold.