Interesting question but the Union Pipes were made in the British Isles - England, Ireland and Scotland (don’t know about Wales) as sets in the museums such as the Morpeth Chantry testify. Reid the NSP maker comes to mind
Uilleann (elbow) pipes - name was ‘proposed’ by Professor William Gratton Flood, Professor of Music, National University of Ireland, 1911 in his ‘learned’ tome “The Story of the Bagpipe”
Anyone selling a set of uilleann pipes made prior to this date (eg by Coyne, Taylor, Kenna, Egan etc.) could theoretically be proscuted for mis-selling 
Pastorals seem to have been the original instrument from which they developed and continued to made alongside the Union Pipes into at least the first part of the 19th C.
T. Crowley’s “How to Play the Irish Uillean Pipes”, published in Cork c. 1936 gives the following :
The Irish Uillean (or Union) Bagpipes
It is generally conceded that this instrument is a development of the older Piob Mor, or Warpipes, which were in use in Ireland, in one form or other, as early as the fifth century.
The late Dr. Gratton Flood in his work “The Bagpipe” gives the first mention of Uillean Pipes as about the year 1584. But these Uillean Pipes were still a form of the Piob Mor, or Warpipes, blown with a bellows, instead of from the mouth.
They should not be confused with the new instrument developed early in the 18th century. The first performer of whom we have any record was Lawrence Grogan of Johnstown Castle, Wexford, who became famous as a composer of pipe music in 1725. The origin of these pipes must be placed at least a few years previous.
The new pipe appears to have become immensely popular as we have a plentiful record of notable performers and composers from the latter date onwards. They are said to have been in high favour up to 1860 and the fact that there were twelve bagpipe makers doing business at that time is proof that the instrument was in good demand. Three tutors were published between the years 1800 and 1807 viz: – O’Farrell’s, Fitzmaurice’s, and Geoghan’s. At christenings, weddings, dancing, and in fact all social functions these pipes were indispensable.
This incidently for those who wanted to know is where the date for Fitzmaurice came from in another thread started a few days ago