Join Text & Wrap: Add A Figure To The First Part Of The Cell

This is not related to macro - it's an excel question regarding wrapped-around text within a cell (i.e.: text brought onto next line by <Alt>+<Enter>)...

SayI have the following in a cell :
Car<Alt>+<Enter>
Truck<Alt>+<Enter>
Van

and say I want to add a figure (in this example 1A) to the first part of the cell and then another to the second line of wrapped text and so on. How can I split the cell (or lookup the first 'wrapped' line) so that I can then perform changes (using formulas with '&' to combine etc or whatever) so that in the end cell have the following:

Car 1A<Alt>+<Enter>
Truck 2C<Alt>+<Enter>
Van 1B