Version 12 is current
You can still download a free Premiere Elements 11 tryout from the following web site
But, you must read carefully the "Note: Very Important Details" section so that you do not run into Access Denied message.
But, this web site will not sell you the product. It just lets you tryout out Premiere Elements 11. If you wanted to purchase Premiere Elements 11, you would need to find yourself an authorized reseller in order to purchase Premiere Elements 11. There may be online locations where the product is still in stock. But...not Adobe.
If you did go for that arrangement, you could
a. uninstall the Premiere Elements 11 tryout and install the purchase product
b. leave the tryout installed and just insert your purchased serial number into it.
Please let us know the outcome.
If questions or need clarification, please do not hesitate to ask.