Good morning Silver Lake,
You are in need of some data scrapping, and I am the freelancer who can deliver!
I would need to know the 3 sites in question, as well as the categories/total number of products.
I would need to know if you would want this as a monthly feed or one time scrapping.
My offer would be to pull the data from the three sites into an Excel csv file. From there you could load to your Magento site.
Bidding higher cost/time wise until I can take a look at the sites you want scrapper and I know if this would be monthly or 1 time run.
I am sending a message to your Inbox from WDWMKR with details. Please review and I hope to hear from you soon!
-Sean