I think you have to assemble it yourself, using your favorite graphics software.
There are three shapes for each letter : left, middle, right.
This should cover all your needs (as long as your monogram has 3 letters)
Regarding the pattern overlay, here's a quick tutorial on how to do it in Photoshop :
https://design.tutsplus.com/articles/how-to-apply-pattern-overlays-using-photoshop-layer-styles--psd-17833All times are CEST. The time is now 22:40