One was converted for a friend by Eddie Green (ex Fylde guitars).
Any luthier would be able to do this, but there are problems. The bridge on a fiddle is movable, so the intonation would need careful adjusting, and the node on a fiddlestring is effectively behind the bridge (try playing a harmonic halfway along the string and measuring the distance - it ain't halfway).

My experience with fiddling is that a lot of the awful noises that happen are poor bowing.

I don't know the cost of conversion, but if you want to PM me I'll ask Eddie