Same thing with them not allowing barrels to be imported anymore. Importation will be stopped, but if they're in, they're in.
One of the reasons the WASR has a bad name among aficionados is because Century themselves converted it to double stack (and added enough US parts to make it 922r compliant). They swapped out the original Romanian trigger for the "Century trigger" which sometimes/eventually leads to trigger slap. This all happened after it was imported from Romania as a single stack rifle. The SAR-1's came double stack, so it's not an issue.
You're also not going to find a single stack receiver built in the US. All receivers (and flats) I've seen are double stack.
Again, get a double stack receiver (every receiver will be), make it 922r compliant, and keep that bayonet lug and threaded muzzle intact (unless your state has it's own ban). Hopefully someone else will drop in here to back me up...