I'll just bet he's planning on powering a WFTM
I could sell you a realy nice switching power supply that would plug into the wall and into your WFTM and will supply plenty of filtered safe power for your WFTM. It is a brick style supply, ask Eugene420 about his he bought one from me for his WFTM.
When you have something that costs as much as a WFTM you don't want to run it with something that could end up killing it, a good power supply is just as important as the load being supplied. the switching power supply I have is the best I cauld find and will delever clean power. they are only $20.00 and well worth it.
Use a transformer to take down your 24(0?) volts to 12 (transformer equations are easy enough, just pick one with the correct number of coils for your input/output requirements and high enough current rating at output), rectify with 4 sillicon diodes or bridge rectifier, then filter with a capacitor, before using an LM317 in voltage "mode" to make a regulated 9v line.