Victor will be coming up on tires soon and I found the Pirelli P Zero Run Flat on Tire Rack. They don't make the front OEM size anymore but they still make the rear. If you search by vehicle, it won't pull up the run flats because the fronts aren't available.
If you do a search on TIRES-BRANDS-PIRELLI then pick Pirelli P Zero Run Flat there's a drop down for sizes.
XLR-V
OEM 235/45R19 Front (not available) instead 245/45R19
OEM 255/40R19 Rear
I know there has been other V owners put the rear tire size in all 4 corners and said they didn't have any problems with rubbing. If the 255 will work on the front then the 245 shouldn't be a problem.
Pirelli*P Zero Run Flat
Pirelli*P Zero Run Flat
Cubby, take a look a look at the above links and let me know what you think.
Mike