Dont panic..
If you were to check the grease seal on the bearing you would find a line of numbers,this isn`t the Hope part number but a internationally recognised bearing numbering number.There are many online bearing suppliers and if you input this number on there web page search they will quote you a price.
I`ve used this in the past and found that shiney,expensive bike bling parts have very cheap (price not quality) bearings.I, replaced the bearings on a Cannondale/Magic Motorcycle bottom bracket for £4.00 the pair.
This will work for sealed hubs,bottom brackets,suspension pivots etc.