Premiere Elements 13/13.1 was the first to state non support for Windows XP, Windows Vista, and OSX 10.7.
For 13/13.1 and 14, see system requirements
Referring to the Adobe System Requirements document, you are probably looking at Premiere Elements 12 as the latest version that will support OSX 10.7.
Adobe sells only the current version which is 14. You would need to find an authorized reseller who still has 12 Mac in stock.
You can use the Premiere Elements 12 Mac tryout from the following web site, but it does not sell the product. You would still need to find a vendor with the version in stock.