IACV issues

[AMBRGurl]

I have a '91 240sx.. about 2 weeks ago she started stalling while idling or idling really rough when sitting at a red light and then eventually dying. After 2 weeks of searching an poking around i've narrowed it to the idle air control valve/ motor. I found the auxilary IACV and got the part number off of it, but it's looking like I'm having a very difficult time finding the main IACV part number. they offer 2 numbers for my year F01 or F11 and i guess i need to know when the IACV is hidding (i think i've found it, but theres no part number or the part i've found...) or any shortcuts to knowing which mine has number wise... thanks