The 245/45*16 is also getting harder to come by. Not many to choose from. I went with 7" and 8" rims, with 205/55*16 and 225/50*16 tires.
Havenīt regretted it once. Sidewalls are near identical and they fill the wheel wells nicely.
PS! Mine is a bastard 77 911S with SC flairs and 964 bumpers, but you get the idea.