Accessories Shrinking Shoes

Have a look at Nata.ko on instagram. She makes excellent custom canvas sneakers at a very reasonable price. The 5.5cm ones she made for me are spot on.

Edit: I guess maybe she is the kind of person who makes the minifee shoes you are talking about... But it looks on her feed like there may be bigger ones too. It might be worth asking?

 

Vinyl shrinking seems like a bad idea - the shrunken heads have only one point they need to fit to, and a relatively simple, self-supporting shape. Shoes soles need to stay flat and fit at all points - both things I don't think the acetone shrinking method can promise.

Cutting the shoe down manually will allow you a greater degree of control over the finished product. Plus, you can make pattern pieces from the deconstructed shoe, which you can use later to make new shoes, if that's your kind of thing.

If you're afraid of deconstructing the shoe because you don't want to ruin it, I think that a 3D printing service may be your answer - it's relatively cheap to get a model printed, and a Polypropylene or TPE filament would give you enough flex to get the shoes on and off the doll. Of course, the problem then is finding or designing the model, but there are a lot of places you can buy files or even get them free.

This is a lot easier to get into if you have a MakerSpace somewhere in your area - there's usually people who are willing to show you how to get started and advise you on project if you're polite.

 

It's also possible to get some feet from a more popular-foot-sized doll, and have your doll wear them when you want him to wear shoes that only fit those feet.
If theyre inside the shoes and maybe under socks, the resin match doesn't even have to be good, you just need a decent ankle fit.