Where to get drought-resistant grass seed mixes (fescue, perennial rye, mixed with clover, etc) in person in Denver?

We leveled some spots in our lawn and are realizing we'll have to disconnect our hoses around Oct. 4th for a few reasons. I dispersed some seed from Rocky Mountain Bioag (highly recommend) but realized I need thicker coverage and don't have time to wait for shipping.

I prefer a drought tolerant mix to save on water as much as possible, but don't know where I can get a good blend optimized for our climate in person. If all else fails I'll get the tall fescue seed mix from Home Depot but I'm hoping to avoid the big box stores.

Anyone know of a place I can pick up? TIA!