I suspect boB has a better solution in the offing but building the caboose end railings from wire is certainly possible if you're building just one or two.
I used the end print as is for the parts painted red, with the exception of the stock ladder painted yellow. I see your ladder integrity has suffered a bit but stock ladder from Gold Metals would work fine.

You can see I started out using the stock end grabs but decided if the rest of the iron was to be made with .008" PB so should they.

All the iron work is airbrushed separately and then applied. I always make lots of extra parts 'cause you never know when one will not fit or fly off into the next dimension. I have a wire bending template drawing done in AutoCad which I will send to you if you wish.

The close up view shows some warts but on the layout it all works just fine IMO.

Best of luck with whichever route you choose.
Steve