I have played a bit last night, tried hot water method but didn't work until wheel number three
So spokes broke from the rim on first two with minimum bending and on wheel three I used almost boiling water but of course that warped the rim.
So I cut the spokes out and used rim from test number two, sanded a bit and this is result.
Not so good but closer then original one.
Let's hope someone will do it right or at least in white metal as you can play a bit more with it.
Some pictures
