FIRST SERVICE SCHEDULE - 3 WHEELER MODEL
Can be downloaded at the following link:
https://www.dropbox.com/s/09ljirqyb9asvgd/M3W%20First%20Service%20Checklist.pdf

As mentioned any competent workshop should be able to do this, or you can do it yourself.
I am located almost 1,000 miles from the nearest Morgan dealer, so I do my own service work.
As Paul says they are very simple cars and really quite easy to work on.
Hope this check list is of help to you.
Best Regards

Past The City Limits