Hi Merrylander,
you wrote: "When you say you get obsolete ICs from China do they actually work? I am desperate for an OKI MSM58141RS and can't find one anywhere".
Well, a mixed reply. i've used the search services provided by
http://digchip.com/ and gotten satisfactory service.
They forward your request to companies having the wanted part in inventory and you receive quotes. Problems occur when the seller has a minimum order often in the range of US $125.00 to US $250.00 and you only want 1-2-3 chips.
Some sellers will call you and often you can get sympathy & work out a deal.
Recent experience: i needed a Sony CX22011 IC (Power management) to repair an Indextron. I got a very good response and excellent English communication with company
http://www.allnewsemi.com BUT i am not sure the 5 ICs purchased work.
The SOP chips have long, uncut leads and i don't know if they have been tested, untested, factory rejects, or just plain phony. (see pix)
I also used this site
http://www.ic2ic.com to locate obsolete parts, here is a screen capture of typical results.
BTW, i am still searching for 1-3 genuine, working CX22011 ICs (data & pinout below).
Hope this helps, wishing you success on the search for the OKI chip,
Best Regards
J.Halphen