Good mornong Graham:

If you're interested there is excellent instruction for altering a standard sports coat into a kilt jacket in J. Charles Thompsons' Book "So You're Going To Wear The Kilt". Should you know someone who is a competant tailor a servicable kilt jacket could be had for far less that one off the rack. BTW I have tried this myself and it works quite well.

Hope this helps!

Bill