Freestyle scooter info for parents and kids
It looks like they are standard diameter bars, so you could get them to work with IHC by cutting a slit in the bars and using a standard diameter clamp.
Go to a hardware store and buy some metric socket cap screws that are the right length for your axles. They should look like this: http://shop.advanceautoparts.com/wcsstore/CVWEB/staticproductimage//N312...
You'll want to get nylock nuts as well.
I assume you mean the Sacrifice Bennis SCS bars. They are standard diameter, so they would work with IHC forks, although you would need to cut a slit in the bars and use a clamp.