The Force40 braking system was used on a few 'Dales for a few years, so the right fork will come up in your size - you'll just have to be patient.
Or, if you find a regular Pepperoni fork, you may be able to make an adapter through the hole for the front reflector. (Possibly, I've never tried this.)
The Girvin FlexStem won't be a problem - there are plenty on Ebay (the original would have had a black quill with a metallic grey body).
Good luck!