Hello opsk1watt,
Saved listings are not deleted from accounts on our end, so it may just be that you need to use the "Show last ____ days" pull down near the top of the page to see listings older than the last 30 days.
As for creating new listings, you can open any Saved listing and make alterations to it and then use the Save as New option, or if you refer to a listing created on eBay that now shows in your Closed Listings, you can use the Import Listings button on the Closed Listings page to import listings into your Saved Listings. Please note that the Closed Listings page references eBay directly, and eBay does not keep listing data for more than 90 days, so you would need to import or relist from the Closed Listings page within that time of the listing closing.
- Craig