UCC28070 current sense transformers

Hi

Since coilcraft CT's are difiicult to get i was wondering if these from Pulse would do the job:

http://www.mouser.com/ds/2/336/-13316.pdf

of from farnell  (Wurth ):

http://be.farnell.com/jsp/search/browse.jsp?N=2002+202665&Ntk=gensearch|gensearch&Ntt=current+transformers|wurth&Ntx=mode+matchallpartial|mode+matchallpartial&No=0&getResults=true&appliedparametrics=true&locale=nl_BE&divisionLocale=nl_BE&catalogId=&skipManufacturer=false&skipParametricAttributeId=&prevNValues=2002+202665&filtersHidden=false&appliedHidden=false&autoApply=false&originalQueryURL=%2Fjsp%2Fsearch%2Fbrowse.jsp%3FN%3D2002%2B202665%26Ntk%3Dgensearch%26Ntt%3Dcurrent%2Btransformers%26Ntx%3Dmode%2Bmatchallpartial%26No%3D0%26getResults%3Dtrue%26appliedparametrics%3Dtrue%26locale%3Dnl_BE%26divisionLocale%3Dnl_BE%26catalogId%3D%26skipManufacturer%3Dfalse%26skipParametricAttributeId%3D%26prevNValues%3D2002%2B202665

Another question, could i put the current transformer in the Source leg of the mosfet's ?

This would give less problems with capacitance between primary and secondairy . (large dv/dt)
(in this case it would also measure Ig )

Or can i put them on the cold side of the boost inductor ?

Some hints are welcome (PFC is targeted for 300W )

This my first PFC design.