[sdiy] sources for yamaha ICs?

[gregory zifcak]

hi,
sorry for the crosspost, i've been trying to get ahold of some opamps for a 
cs30 for a little while, with no luck. i'm looking for ta7504m and ta7505m 
opamps, BOTH listed in the service manual as IG001040 (along with a bunch of 
other parts. ?). i've tried emailing these two, but one is out of the office 
until the end of may, and the other results in a delivery failure.

http://www.lizardweb.com/organ/GOS_semiconductors.pdf

http://www.wdgreenhill.com/AtoZ/Yamaha.htm

any pointers much appreciated.
greg