Well you can look at local metal fabricating shops if you have any near you, ask if they have old stock scrap. If you buy this stuff it will cost a lot in stainless. Is there any way to contact the person who made the one in the picture? They do have similar ones on eBay but I think you want to build it yourself. Finding and cutting the parts to size could be expensive and a challenge if you don't have the tools. The first thing I would do is design it either on paper or in a cad program. Then look for a fabricator around where you live to see if they have some scrap
I would be happy to draw the design out on either cad or drafting table if you like. I can look at that picture and have a good idea of dimensions, the design is simple, and you could get rid of some of the decorations like the knob on the handle that would just run costs up. Let me know if you want the help, I can get it done this week and post it here. I will look some more online today for an inexpensive place to get the parts needed.