It's really easy to do it yourself, and you don't need to buy a kit.
Simply mix up a batch of ingredients, suspend the parts to be plated in the solution on a wire from a beam.
Suspend one or more zinc anodes in the solution, not touching the parts.
Hook up 2 - 1.5 volt batteries in series with one wire to the parts (-) and the other to the zinc anode (+)
Sit back and watch it happen...usually takes 5-15 minutes per batch.
Remove the parts, rinse off, and brush to a shine with a brass wire brush.
Its really quite satisfying and theraputic, but it can also be habit forming!
Here's the formula:
1/2 lb white sugar
1/2 lb epsom salt
2 qts white vinegar
2 C batteries (in series)
1 slug of zinc anode from local hardware store
The parts need to be really clean first, I so de-grease with Simple Green or the like, and dip them in The Works toilet cleaner to remove any rust for a short while, then rinse and immediately begin plating.
Don't inhale the fumes from either process or light up near the batch!