TonyB, From what I can work out the 250H is very similar if not the same
. They seem to have the same part number 4V4-W1441-00-00 and apart from the boost bottle and reed block assemblies are all the same part numbers. Do you have an old had it one or nothing at all. No I don't have one, so I haven't really been much help have I
I may have doubled your options though