Responding to earlier reports that Apple hasn’t offered developers parts or specs for next-generation Dock Connector accessories, additional sources have confirmed to iLounge that Apple will be the exclusive initial vendor of a new Dock Connector Adapter, to be sold individually and/or in three-packs. According to sources, the Dock Connector Adapters will sell for approximately $10 each or three for $29, with Apple-branded new USB cables selling for $19 each. For reference, Apple’s MagSafe to MagSafe 2 Converter sells for $9.99, while international pricing for Apple’s earlier iPhone Micro USB Adapter is €9 ($11) or £8 ($13).

While leaks of the new connector have been numerous, Apple has remained mum on what developers are calling the “9-pin Connector,” even though sources claim that Apple has in recent months stopped approving third-party proposals for connector-equipped accessories. Some developers fear that Apple will corner the market for both the adapters and cables, much as it did with MagSafe connectors for MacBook laptops, using licensing agreements and threats of lawsuits to prevent less expensive third-party solutions from coming to market. One source notes that Apple will reap a windfall by limiting competition in this manner, generating revenues of $100 million for every 10 million Dock Connector Adapters it sells for $10. According to the source, Apple estimates that it will sell the first 10 million Adapters by the end of 2012. It remains unclear whether Apple will allow third-party developers to release competing alternatives before then, or afterwards.