I've got a five-inch model 28 barrel you can have for $35.
I bought it for my model 27. I couldn't find a five-inch model 27 barrel, so I settled for a model 28 barrel. It shot well, but I didn't care for the look and feel of it, and ended up having the Clark bull barrel put back on, then cut down to reduce the weight. It's now as accurate a gun as my best Python, although the trigger is still a Smith & Wesson.
The model 28 barrel set me back $100. It's just taking up space in my barrels box. The original 8.375-inch model 27 barrel is right beside it if anyone has a use for it. The latter had a corrosion spot caused by a carless thumb print.