I've had to replace one wheel due to leaking. Mine were Dexstar steel wheels, available from
etrailer.com (clicky).
Of course, you'll want to purchase wheels that match your others by appearance and
most importantly by weight capacity, tire pressure capacity, offset, diameter, width, and hole pattern .
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There's lots of advice and information in forums... sometimes it is correct. For example, all of my posts are made by a political appointee who got the job as a reward for contributions to my diesel bill.
2011 Jayco 28.5RLS; 2021 Chevy Duramax; Pullrite Superglide Hitch