If you haven't bought the replacement bearings already you could measure the old ones in this order: inside diameter, outside diameter, and width by metric measurments or inches. Then do an internet search using those measurements like "ID x OD x W bearing" and you may be surprised by the acceptable replacement bearings that may save you money. Search using both types of measurents for the most results. If you already know the numbers of those replacement bearings you can search that bearing for its dimensions and then use those same dimensions for finding an "equivalent bearing"......hopefully at a more reasonable price. Unless they are some really special bearings.