Here's a list I compiled from various sources on Rye Whiskeys and the distillery/company that produces them:

Heaven Hill (Bardstown, KY):
Pikesville Supreme
Stephen Foster
Rittenhouse

Jim Beam (Clermont, KY / Boston, KY):
Old Overholt
Jim Beam Rye

Wild Turkey (Lawrenceburg, KY):
Wild Turkey Rye

Stitzel Weller (Louisville, KY):
Old Rip Van Winkle Old Time Rye (12)
Van Winkle Family Reserve Rye (13)*
Hirsch Rye (13)????????*

Anchor Distilling (San Francisco, CA):
Old Potrero (1)

In decreasing order of rye content:
Old Potrero (100%)
Old Overholt (61%)
Wild Turkey (54-55%)
Heaven Hill (52%)
Jim Beam (51%)
Stitzel Weller (unk, at least 51%)

Any others?

Cheers,
Bushido