As you probably already know, DESA International is no longer in business. However, depending on the age of your unit, some parts are still available, as is the Owners Manual. The parts for Comfort Glow gas logs (which is what you have. And probably purchased them from Lowe's some years ago) are interchangeable with DESA's Vanguard line.
You can find what you're looking for at www.desatech.com. However, don't be shocked by the price of the replacement logs.
Answers & Comments
As you probably already know, DESA International is no longer in business. However, depending on the age of your unit, some parts are still available, as is the Owners Manual. The parts for Comfort Glow gas logs (which is what you have. And probably purchased them from Lowe's some years ago) are interchangeable with DESA's Vanguard line.
You can find what you're looking for at www.desatech.com. However, don't be shocked by the price of the replacement logs.