Many ways to go about this, none really painless. It took me over 6 months to locate the last wheels I wanted, but you might find what you want the first day. I searched on ebay etc. I also went to auctions and salvage yards. I asked bikers if they had what I was searching for. Lot of work but with patience I found them for a very reasonable price. You got to do the research & know what you want. The easy way (kinda) is call a custom motorcycle wheel smith, like Buchanan's in Azusa, Ca. You supply the hubs and brakes off a small bike 125cc or so and they will lace them right. Quite expensive and not quickly at all, but just what you specify. Others may have a favorite shop for this. You could spend the same amount of time and less money to learn how to lace your own wheels, but few take this route.
Perhaps someone on this forum has a set to sell & that would be great luck on your part.
Rick C.