I am not sure you can get Michelin brand red line tires.
However you can diamond back red lines at
I just switched from Michelin redlines to a set of modern Yokos. The red
lines are not cracked and still have a fair amount of thread. Although one tire
worn on the inside edge from a bad wheel alignment a long time ago. I did
take a 1400 mile trip on them last summer without any qualms. If you absolutely
positively just have to have Michelins, contact me off list.