[cheebacheeba]

Well, since you're considering it...they're actually super easy to make at home, they end up even cheaper too.
Here's a quick recipe that might help, for the chicken one:

With the chicken, get a whole chicken (or more)and cut into pieces.
Boil
*some water
with some
*vegetable stock
*lots of light soy
*a little dark soy
*some peppercorns
*a bay leaf
*a few star anise
*garlic
*ginger
*some chinese cooking wine (Shoaxing)
*a bit of sichuan pepper if you can get it
*maybe 1/4 of a cinnamon stick
*a couple of dried (preferred, fresh is fine) large red chillis
*a little sesame oil
*some chopped onion.
*Dried onion
No exact amounts here, I never do that, each to their own taste so experiment a bit.

Just simmer/boil your chicken in that for quite some time. There's no maximum really but what you want is to be able to pull the chicken off the bone.

Now one thing is you can actually keep the liquid to cook with another time, something a bit like what they call a "master stock", you can top it up with more flavours every time you cook with it, or use it to add to things like stir-fry etc. The important thing to remember is proper storage - Strain it well first, then into an airtight container and frozen as soon as it's cooled sufficiently, only take it out when it's going to be used again.
To add to it at first, or later if you want to cheat a bit there's store bought master stock mixes, though I'm not sure how good they are on their own.

Get your bread rolls, as you like them, butter or not.

With the carrots traditionally they're pickled but if you don't want to go through the trouble I see little difference, I simply grate fresh carrot for mine.

Get/chop:
*Carrot
*Spring onions
*lettuce (butter or coral)
*Corriander (cilantro, the leaf bit)
*Red chilli - Can be left out, but IMO should be at least a little on there.
*Cucumber (in "sticks", no pulp)

Throw that on your roll with the chicken which can be either served hot or cold, and drizzle a little bit of light soy over the top, and some white pepper if you have it, though any will do.

There you have it...it's the relatively basic version and once you have a pre-existing stock it's even easier. They're awesome to make at home and/or for when friends come over and basically one of the most economical and healthy things to throw together for yourself.