Seems like a fairly simple mod. A hardtail Mustang or Duo Sonic and just get a new pickguard with neck pickup only and voila. Perhaps a 3 saddle old style bridge too if it's a direct replacement.
My question being, is the Squier bullet Mustang worth a look at here?
I had a bullet strat before which I modded. It was as light as a feather though, but played reasonably well for the price. I also think these bullets have enough space under the stock pickguard where a single coil and a new pickguard could work easily.
Are they worth a punt, or worth holding out for a used duo sonic or player series Mustang?