Hello.
So, you have said that you don't have and cant get Handcuffs which is fair. But what have you got?
I don't expect it to be rope and stuff, but I more mean like cloth belts (normally detachable from bath robes, ect) or other stuff like that what you can use. Nearly anything can be used as long as its of a decent length (would say about 1m minimum depending on the thickness), of a decent thickness (this is personal choice, but for example shoe laces are too thin and will hurt you, thicker it is the safer it is but it will also feel different as well) and if possible don't stretch as then the bounds will not misshape too much.
As for ideas, their is a good thread where I have been helping someone, you can find it
here. Hopefully this will give you a few ideas, and hopefully you can get back to us with a rough idea of the stuff you do have to use.