There is a Miles Messenger plan available from
www.modelflyermagazine.com . Go to the "shop" click plans and go to page 3. Its on there.
It was featured in the magazine as well so you could (presumably) order that back issue with the plan. This ones a bit bigger you would have to reduce it!
Miles 38 Messenger
Jul 2000 (Vol1/Issue8)
Graham Smith
Class 1 R/C scale design, '60' - '100' engines and 5/6 channel, 100" wingspan.
Price - £22.95