Forever 21 has a pair of red soled shoes which of course instantly reminded me of Christian Louboutin. I couldn't find an exact match, but to give you some idea, these Christian Louboutin Fortuna Satin Platform Slingbacks (above) sell for $963.63 at mytheresa.com. Note the trademark red sole.
Here we have Forever 21's Strappy Platform Sandals which sell for $24.80. You won't fool anyone but if you're looking for a red-soled shoe at a fraction of the price to compliment your wardrobe, these are an amazing alternative!