I don't know to be honest as it's not something i have ever done.
I think you would struggle to modify the old bulb housing unless you are some sort of electrics guru.
I have a kit on my dipped beam too which was straight forwards to fit. I would have thought if it was a kit it would be the same.
Can you not speak to the people you bought the kit from originally and see if they have any specific bulb holders for it?
Carl