I'm looking for a replacement CCFL for a Powerbook 160. It was never a separate part number and never sold separately; back in the day the entire LCD assembly, backlight and all, was treated as a whole unit.
It is possible today to buy CCFL tubes of the appropriate sizes, so maybe the thing to do is to take the measurements of what's in there and order the replacement that way. This is probably one of the reasons why the inverter boards differed slightly between the different LCD models - the CCFLs were different sizes and shapes.
For example, these are the inverter boards for the Powerbook 140 (above) and 160 (below):
View attachment 69955
And these are the CCFLs for the Powerbook 140 (above) and 160 (below):
View attachment 69956
The 140 CCFL goes in the Sharp LM64P51 and the 160 goes in the Sharp LM64P58. The different sizes correspond to different voltages, hence the different inverter boards. I haven't measured the 140 CCFL as mine's working, but the 160's CCFL appears to be
160mm x 3mm in size.
If you wanted to replace the CCFL in the 180, you would have to take the LCD out, get the CCFL out, measure it, and see if you can find one that matches the same dimensions and hopefully voltage. I haven't opened up an active panel yet. Hopefully the CCFL on those would be in a separate compartment, as it was on the Sharp passive panels, so you might not necessarily need to take the entire panel apart to get to it.