I want to make it roughly around same size (~35in x 14in) as my current one, an Aukey XXL. I have picture in mind (design below - don't judge quality, as I'm not a graphic designer and it's not done yet). Has a lot of colors but it's not very high res, but still want it to turn out well. Only need one, maybe two, so can't use any service with a minimum order quantity. Thanks!
Design:
https://imgur.com/Ptbe8Gy