In the long run, you will save yourself a ton of money making your own leaders. For your floating line, start with 4 feet of 40-50lb, tie that to a few feet of 20-25lb down to whatever size you want to end in. I use 15lb next. Join them with double uni knots and put a perfection loop in the end of the but section.

You will not need as long a leader on the intermediate line but I would still use at least two sections that taper down.