Need a Business Card Designer for my website.

If you go to any of the following: [login to view URL] - [login to view URL] - You will find what I am looking for. I don't need integration with a store or anything even though that would be nice. If it can be integrated with a square store for checkout, I don't use paypal, that would be great but I'm going for low cost here. I am really looking for something that I can install onto my server or wordpress site as a plugin to allow users to design different sized cards and flyers and then send the files to me for printing. I can manually process the orders so again it doesn't need to be integrated with an e-commerce store. Being Graphically speaking I want an updated look and many of the card designers out there look very dated and cheap and require a connection to woocommerce or paypal niether of which I care to use unless you can convince me otherwise. Really if someone can clone something similar to either one of these for a low cost that would be ideal. I am being relatively cheap for this project since there are available plugins for less then $25 for this exact use. However the main thing is that I don't want the woocommerce integration that comes with those and they are also limited in customization. I'd like to be able to add in products for example like maybe we will start doing 5x7 postcards instead of 4x6 then I'd like to be able to add in that product later.