The dimensions you list are inputs, not outputs. That is, you must define these values, regardless of what method or software you're using. Perhaps you might ask, "what are typical values for ..." In order to answer that question, we would need to know what you intended to use the heat exchanger for, what fluids, pressures, materials, etc. If you can't get details from a manufacturer, you can find photographs on the Web of similar heat exchangers that show these details, mark off the distances, and scale accordingly. Like 18 pixel bundle gap compared to 3000 pixel shell diameter. I once scaled objects in a photograph based on a paper towel dispenser hanging over a sink because there were no humans or doorways to provide scale. You may even need to correct for depth, but you can do that too.