HI Kiyoshi,
I am a simple man with simple requirements and I have used Kumho Solus TA11, 155 X 13 for the last mounting and the previous generation of Kumho's before that with great satisfaction. Yes they are base line s**tbox tires but they are perfectly fine for hooning about the Colorado back country and are available at Tire Rack for $43.25 each
As I passed through Indianapolis with the Plus 2 where I needed tires fast without much to choose from that was in stock and could be mounted pronto, I got a set of Falken Sincera 175/70X13 from Discount Tire for about$52 per tire and they seem to work well too.
Both of these modern tires have rounded shoulders so they act like the original Dunlop SP41 tyres. They are certainly better than 10 year old anythings
Now if you want the real thing, go to Coker Tire for Michelin XZX tires or for a pretty good facsimile Vredstein tires at about $125-$200 per corner