CLK 500 Winter Tires Help!!!!

Hey guys so I just got a 2003 CLK 500, and I’m looking to get winter tires. The issue is, I can’t find any that fit my car because it’s staggered (225/45R17 in the front and 245/40R17 in the rear). I can find tires that fit the front but I can’t find anything for the rear. Can I just get 225s for all 4 and just have a squared setup for the winter?

What do you guys think?