Magnetic disc

[jennysunrise]

I took my rad mini step thru out of my shed and a piece of plastic fell to the ground. My magnetic disc broke off? Anyone else experience this and how much does it cost for the piece? i don't see it on the site? and how would this break off? is it defective? My bike was sitting upright in my shed all winter, nothing leaning on it.

[inoxa]

I think I have seen them on ebay but I think any brand will work....they are just magnets. 
Try Area 13 for help.  They do respond quickly by email.  Good Luck.