Replica Bag Makers

Are there bag makers that take on requests for replicas - with personalized tweaks?

I'm curious to know how much of a mark up there is versus the original cost of the bag. Naturally there will be price increases to source materials in low volumes but is it like 3x? 5x? 10x?

There are only so many ways to make a bag unique but does this cross some kind of honour amongst custom bag makers? Does this infringe / violate trademarking?

I just got a new bag and sitting it next to the old version I'm like completely in shambles because the newer version is giving me WTF vibes. I just want essentially the same bag that is now discontinued, with obvious improvements.