Hi! Well regarding the wheel - I'd definitely leave it in for her. She'll get used to it in no time. The Regular sized Silent Spinner is the ideal size for a WW; anything smaller would be too small. My WW had one, my Robo' hamster has one, my Chinese hamster has one and my other dwarf hamsters also all have this size. So it's fine!
It just may take a bit of getting used to, that's all. The same goes for the cage really, it just might take a bit of getting used to the extra space she has, but she will get used to it! I put my Robo' into a bigger cage the other day and at first she was a bit befuddled but she's now very happy in it.
For both toys and the Ferplast tubes / stoppers you need I can recommend
Equinecaninefeline - you may find they work out cheaper than ebay as they only charge once for delivery and it's a very reasonable price. You can find the tubes you need
(((Here))) and
This Stopper Here will 'bung up' any holes that need stopping up. :P
Another great website for hamster climbing toys which I can also recommend is
Zooplus.
Hope this helps a little! x