Why can't I find the variables for how people searched for their jobs (e.g., FWKRELAT) in the 2010 waves for CPS?

The raw data from CPS states that these questions were asked in 2010, but the IPUMS version does not appear to contain these variables. Is there a reason for this? Or perhaps I am looking in the wrong place?

Variables addressing job search method are a part of the CPS basic monthly questionnaire, and they are not currently available via IPUMS-CPS. However, we plan to add these variables to IPUMS-CPS within the next few years. You can get these variables from the raw data at NBER, and if you would like to merge the basic monthly samples with the IPUMS-CPS basic monthly samples see the answer to this question.