Beyblade Stadium Suggestions

Hi guys do you know of anything that i can use as a beyblade stadium???

I live in New Zealand and the only beyblade stadiums they have out are the Super Vortex and carry case stadium (both $50+ and i have no money)

My parents won't allow me to buy off ebay or any other bidding site

The PTW stadium is out as well but it costs $30 and from what i've heard about it....it's not very good.

So please tell me what i can use e.g cooking pot lid (I broke it and my parents got pissed...) or whatever. Don't say that it's against the rules and it won't make your beyblades work properly. I just want a place to play in.

Thanks

Edit: Would a Battle Strikers stadium work??? They sell them for 6 dollars and it's pretty big. around 50cm by 40cm. But I don't think it's sloped.
Choose anything then. We will not advise you on how to play illegally, that is simply odd.