You may want to clarify what you are looking for. CDs with monograms and designs are available almost anywhere.
It is recommended that when you download monograms and/or designs that you do back them up on CDs or USB Drives. Buying a monogram set on a CD would be in the $80 to $100 range for 8 to 10 sets. Whereas sets of monograms are around $20 and you could put dozens on a CD or USB.
If you are relatively new to machine embroidery, you can get some designs from the "Galleries" at the top right side of any page here at ATG. Read the instructions. There are free designs and designs which are free if you belong to Ann's Club. A membership in Ann's Club is well worth the price because of all the discounts and freebies you get.
Pat, The Avid Embroiderer
If you are interested in selling your projects, you can determine your costs and profits quickly with my Spreadsheet.
If you want a lot of great information on working easier, faster and more confidently on your computer, check out my Tips and Tricks.
If you want to see my pashminas (that I successfully sell retail) check them out here. I also wholesale them.