Blake,
there are several options that you might want to consider. It is difficult for me to give you a simple answer about doing it yourself because I don't know how comfortable you are working with these radios. For me it is an enjoyable hobby but I don't have the time at this point in my life, to do it for a living. They are a fairly simple radio to work on, and obtaining parts is not a big problem. If you wished to give it a try, I could guide you step by step here on the forum and deal with any problems that might come up. In the event that you were stuck, I could resolve the problem if I had access to the radio for a few days. Here are some other options.
There are some in the business of restoring these radios, or at your option, completely replacing the insides with modern electronics. In general, with the modern electronics, I would expect that you would end up with a twelve volt setup.
There are also vendors that sell brand new radios that use reproduction dials and knobs and they look virtually identical to the original. You could buy one of those and sell your radio. When the bidding is really intense on Ebay, these unrestored radios do go for up to $350. As a trend, the prices seem to decline around Christmas, presumably because of other priorities with the buying public.
In any event, these radios are a valuable item to own at the moment. Just the other day on Ebay, there was a volume control offered for one of these and the bidding was at $201, the last time I looked!
