There is almost always metal in the pan from clutch and retaining ring wear. Shavings are not necessarily a problem, chunks are a bigger deal. A good transmission tech can often put enough of the chunks together to figure out what part it is.
$2000 sounds about right for a rebuild, or maybe installation of one already rebuilt. I would expect a lot more for a new transmission, assuming MoPar still has whichever of the half dozen different automatics Dodge was installing in the Ram Van and pickups back then is needed by yours.
I've had five different automatic transmissions rebuilt, usually by an independent shop recommended by people who have the work done regularly (e.g. used dealers and shops that outsource rebuilds), and two rebuilt by the selling dealer.
One of those was rebuilt twice before they got it right, because getting it right required Ford to upgrade some of the parts over three model years. A dealer rebuild on my 92 Dodge van was $1500 about 14 years ago when labor was only $30 an hour, and the rebuild kit included some significant parts upgrades, including a new computer to control it. Thus sometimes a rebuild is "better than new" or at least better than yours was when it was new.
Problem with replacing a single worn part like a worn out one way clutch (or anything else on the shaft) is that the labor is almost the same as for a rebuild, the main difference in price being the collection of new parts in the rebuild kit.