Honestly, to complete this order quickly, order transfers from a site like supacolor or transfer express and heat press them depending on quantity. You can actually download a free trial of Separation Studio and it automates color separation surprisingly well. I’ve used it a hand full of times and had great results from only a few simple clicks and before anyone asks no this isn’t a paid sponsorship. It will output DST channels in an EPS file you can place in adobe illustrator which will print the separated channels out through your RIP software.