There are several options. If you're willing to use V3 clothes, and forgo body morphs, there is a V4 to V3 figure which you should have if you bought anything other than the basic V4 (I think). Prop shoes can often be fitted to a different figure by scaling and translating them; tough cases may need some work with magnets too, and/or postwork. Conforming shoes can be converted to props and refitted as above - just export as OBJ, and reimport with all the boxes unchecked. You'll probably need to reapply textures etc.