CA debonder is available and does work. Some people say it is just acetone- this may be but I can't confirm that. I use very little, so even though it is a small bottle I don't spend a lot of money on it because I do not use it regularly.
It does mess up finishes, so best use it if necessary before you get to painting. One thing I have noticed- it weakens styrene. Do not let it set on plastic too long. I find the debonder softens the bond in about a minute, but be careful how you pull the pieces apart. Try to cut them apart. Otherwise you may pull a chunk out of one of the pieces, or bend or misshape one of the parts.
Debonder has rescued projects for me several times, so I make sure I keep it in stock.