I feel like that little mouse on that wheel (sorry poor pun). I run for hours and don't get anywhere. For the life of me I can't figure out or find the center cap or hub caps or ANYTHING to fit these wheels. Thay measure 50 mm across. This is My third attempt here so I either get it or........any informations or advice would be greatly appreciated. Thanks

Pretty sure it's these: http://www.ebay.com/itm/SET-4-ORIGINAL-GEN...738.m2548.l4275

Yep, those are correct.

Awesome thanks!