Archie's Grobags (Inner pocket opinions please)

Hey Scot just had a bit of a question/suggestion. I was wondering if it was possible to make a bag with some padded loops of fabric inside (a bit like the stuff you use for the straps) to hold camera equipment/lens I did a pretty bad drawing but hopefully it'll give you an idea to what I mean.

If it is possible can you let me know how much extra it would be for my bag?

I'd be interested to know how this turns out.

I was thinking about solutions to this problem, but I had thought it would require something similar to a top loader, but which could be attached to the inside front of the bag. I was still worried about it being uncomfortable when the bag was empty.