Yep, vnbWK2's method works great! Only the top shelf of the glove compartment needs to come out. Photo how-to below. My filter was very dark grey after 10 months in relatively clean air around here.
Only drawback was the $42 Cdn cost plus tax at the only known supplier, a Mopar dealer. Filter is Mopar Part No. 68079487AA. It is about 10 inches square and an inch thick.
With photos, this took less than 15 minutes. Now that I know the method, it can be done in 2 minutes tops.