If you cannot source or borrow a remover, there's another way.
But you'll need to remove the axle. Take the wheel to a hardware store, and find a big bolt (hex or square head) who's head just fits into the freewheel and engages the splines, the same way it would in a 12 point socket. You might have to file a bit, but I think you might find something that works as is.
now you have a remover, either hold the shank of the bolt in a vise and turn the wheel or hold the wheel and turn the bolt with a pipe wrench, or vise grip pliers.
I know it's a pain to remove the axle, but on the bright side, a bolt is much cheaper than a freewheel remover will be.
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