Hello Karen, welcome to CDF
My choice would be Taiyo Yuden for CDR :iagree:
You don't say where you're from, but there are a couple of great places online to buy genuine TYs - www.rima.com if you're in the US, and www.svp.co.uk if you're in the UK
Other than that, just look for "Made in Japan" on CDR packages in B&M stores. Though as mentioned, for that quantity, buying 100-packs online is probably your best option.