Check the details on that rebate. I think it ends at the end of March, maybe you just need your Midway receipt to submit for it.
I just checked them, you are good. Purchase during March, submit rebate by 4/30.
For cleaning kits, I'm a fan of a bore snake in the appropriate caliber, along with some patches, and a set of plastic dental picks.
For cleaning fluid, find one you like, I've used tons of different ones over the years, they are all about equal, currently using CLP, Shooters Lube and Hoppes.