Sudco does offer all replacement parts for the VM38. I had to order quite a few parts from them. Here's the deal with them. They only take orders over the phone and orders must be at least $25. I suggest you order two of every thing just so you have it on the shelf.

90 degree elbow is part number 007-731

Parts for the VM-38 start on page 117 in their catalog which you can get from here
http://www.sudco.com/vol34/sudco34cat.pdf