Wanted. 2 wheels suitable for dwarf hamsters.

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Hello, I really really hate asking this and please mods delete if inappropriate for the forum but I had 2 dwarf hamsters dropped off to me this evening and they are in awful cages with wheels that just dont turn!
They are fat enough as it is and I dont want to leave them without wheels as no exercise wont help them.

Only problem is I've had sick bunnies the last week and so my wages are spoken for and I wont have money for just over another week.

I desperately need 2 dwarf sized wheels for free (VERY cheeky to ask I know)
I would of course pay for the wheel and postage when I get paid on 17th this month.

If anyone could help then I and the 2 chubby hamsters would love you forever!