Where can I buy Milton porcelain male doll shoes?
If you are looking for one pair then you may have better luck (and maybe less money even?) looking for a used Milton doll.
This is probably the only way you will find 'original' shoes as others will just be a 'generic' pair that will fit many different dolls.
If none of this matters you can post your question to a doll forum and someone will provide an answer.
You can check here on eBay they have a lot of vintage doll shoes for sale. You will need to search through them to find the ones you are looking for.