There are lots of sources for rims and not so many for spokes. Lacing and truing wheels is not at all difficult, but they may test your patience.
As for your choices there are many. You could buy a used wheel in good condition for less money that you would have to pay for a set of stainless spokes and nipples (~$125). If your existing wheel is round and straight it might be re-chromed and certainly can be powder-coated. Paint is not a good choice for refinishing chromed rims. You could also buy new rims, either factory replacements or from the aftermarket, both of which can be quite expensive. There are surprisingly few sources for spokes. Many on-line sources advertise their availability, but are constantly "out of stock" when you try to place an order. The only sure source for them that I know of is Bucanons (sp?).
Do a search on lacing and truing and you will find a number of good articles on both subjects and several with step by step instructions and photographs. Of course you can take lots of photos of your own wheels before you disassemble them, and if you're lucky you might find a stock wheel to have by your side as you re-lace yours. One way or the other its really pretty easy to do. Truing is pretty much the same. There are instructions to be found on line and the work itself is not hard.
Both lacing and truing do require some tools that you might not have. First you need some way to hold the wheel. You can clamp down the axle between two tables of equal height, you can concoct a stand of some sort; personally I use an old aquarium stand that's made out of 2"x4"s. For lacing you should buy a spoke wrench. Get one with different sized jaws in various sizes. For truing you should buy a dial indicator, though you can get away without one and just devise some sort of indicator. The real thing, the dial indicator (and clamping hardware), can be had for very little money used (E-Bay) and there are lots of them available (out of work machinists). It is a tool you will use for the rest of your life.
I'd encourage you to do it, rebuild your own. Its a satisfying thing to have done and of course if you do it and do it right then you'll know it was done right.
Here's mine:
Before
After
