I have an 2003 viking: model# VH4815KAC serial# 443915 On the eXmark parts website, it doesnt show the deck spindle bearings being available. Yet JThomas shows the spindle bearing being eXmark part#303057, i typed that into the eXmark parts website and got a newer part#303543. Is 303543 the correct part# for my mower? Also, i called a dealer and the bearings are around $10-$11 each, correct? Is there a big difference between an OEM bearing @$10-$11 and a JThomas bearing @$7? One last thing, my mower has 16x7.5-8 tires currently on it but i have access to some 16x6.5-8 tires, will the smaller tires fit on the stock rim?