hi cynthia,
many of our east coast native azaleas are quite fragrant.
according to this site, r. occidentale is the only one growing naturally west of the rockies.
there can be variations in color occuring among populations and you might compare the photos at the link below to what you recall seeing.
you should be able to locate the species plants in some nurseries and there may be other forms developed from them that are being marketed.

Here is a link that might be useful: r. occidentale photos

In addition to fragrance, native azaleas are also known for one of their "unusual" colors, yellow. You can also check for information on varieties of R. austrinum (Apricot, Sunrise, Pure Yellow, etc.) on the link below. R. austrinum has a honeysuckle scent. Luis

Here is a link that might be useful: Native Azaleas