Is using washers for a spacer a stupid idea?

I have new 10mm axles (Savage Trucks) and am placing the new 10mm bearings. Unfortunately, they didn’t come with spacers and 10mm spacers appear hard to find.

Is using a stack washers to fit flush with the inside margins of the bearings a stupid idea? Or should I keep searching for spacers?

Thanks in advance for your advice!

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