What you might be able to do is get a second set of the red rear ones and modify the car to have them in the front? The clear markers that you have are for the front only but can be made to fit the rear by drilling a new hole and expanding the notch (on the car, not the marker).. you may be able to do the same to the front marker area to get the red ones in front as well...

2nd option would be to get a second clear set and put them on the back so you match all the way around (that's what I have)

3rd option, get the amber fronts and red rear so that everything is flat and you don't have to modify anything, and then just tint all 4 so you can't see the color