Welcome to TM Colin, reading your post and noting your names perhaps you will be visiting Scotland...(-: Very lucky with the weather for sure.. I hope your Morgan acquisition works out as you might hope, but my guess is that there are Morgans enough to be found in the US from those in need of restoration to garage queens, so perhaps no need to wait till the Plus 4 is available in your part of the world..
Hope the weather is kind for the rest of your trip.