Magento Extension to manage multiple Import Feed API

I need you to create a Magento Extension - Feed Importer, that will connect to my suppliers feed API regularly to import in their available stock qty information for products that are already on my website. (Using the SKU - this always matches the suppliers).

The extension will allow me to setup multiple import feeds from my many suppliers stock information, using their API info to import in the live stock number into the matching SKU stock field.

I have example supplier feed API information that I can send you to read through. Some of the settings/setup from the suppliers do differ slightly so I can provide three or four examples so this system will need to be reasonably flexible.

I need to be able to use and manage the extension myself, ongoing, on one website, to be able to add the feed importers/API myself.

Please send me your fixed price proposal with a rundown of your plan to complete this to the brief.

Thank you