I wish I could be more helpful, or at least optimistic but you will be lucky to find a hunt this late. You could go to the Colorado or Wyoming guides sites and start making calls, or the local game managers or wardens but first you need to find out where you can get a license. Getting a license is usually done through a draw system with guys with preference points getting picked first. If you can find a route to a license you might be able to find a guided hunt if someone has cancelled due to fear of the virus and traveling risks. It is possible to get an OTC tag in a few places but it would be very crowded and a very poor hunt.

All of the outfitters that I know were fully booked months ago on their cow hunts. Cow hunts are relatively inexpensive and have a high success rate so most of them are booked a year (or more) in advance. I hear that some of the more expensive cow hunts can be booked later but even those are probably gone by now.

My guess is that either Colorado or Wyoming would be you best shot at getting a DIY cow hunt, but I doubt that it will be in 2020. I believe you are too late to even get a preference point for next year in Colorado but you can still buy one in Wyoming. A preference point would help in drawing tags next year.