DB Spider | Scrape that will import listings for PhPAuction

I need to have a DB Spider program that will import listings for PhPAuction XL Premium program from other auction sites. This script must be able to be run on other auction sites and return all auctions with all specific tables for a specific user. This import must integrate with the current DB and be seamless so that the listings are automatically placed into my sites DB after the spider is run on another auction site. The Goal: To be able to spider users auctions who have a large number of listings like 3000 and import them into our auction sites database so that there is no manipulation needed to complete the listings migration from the outside auction site into ours per clients request. So similar to a batch listing but data is imported with this script from outside auction site and automatically posted in correct schema into our site.