You can manually submit it. Go to each search engine page and start looking for where to submit for free.
I have a program called
Web Gold that I use to submit mine for me when needed, but those programs are pretty expensive so I think many people who don't find the time to do the submitting on their own will often hire that service out.
Also, the more links you have to your store out there, the better in terms of search engine crawling...

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