Steerer tube shims for quill stem? My current stem is 25.4 mm in diameter. It's way too low and long. It's a threaded fork.

I have a nice quill stem adaptor that's 22.2 in diameter that would be nice to use. 

Are there any shims to go from 22.2 to 25.4 and is it worth it?

I found some from Problem solvers but it seems to be for threadless stems only. 

what would you do? would a shim be safe here or is it a no-do?

UPDATE: I found a shim and installed it. It works really good. Much better than my old crappy quill stem.
Threadless quill stem adaptors do commonly come with a shim, so that they can be used with either size steerer, e.g. 
http://harriscyclery.net/product/velowerx-universal-stem-adapter-quill-to-threadless-5423.htm

I've never seen such a shim sold separately, but a search shows up https://www.amazon.co.uk/Alloy-Aluminium-Quill-Adapter-Quillstem/dp/B00K7ECRLO, which is currently unavailable, but was sold at some time, so you might find one.