Hi Dave. Just in case you don't know - Yeomanary Miniatures makes castings of a Marching RSDG band (1971-1996) - in a 20 piece set in Review Order with helmet - or available as singles for a band of any size really. Has Bandmaster,Bass/Side drums, Cymbals, French Horn, Sax, Picallo, Clarinet, Tuba, Euphonium, Cornet and Trombone as instruments.
Yeomanary also do The RSDG Pipes and Drums as a 16 piece marching set - again in Review Order with Bearskins and Highland Bonnets - with Drum Major, Pipers, Side and Bass Drums. Again - you can buy singly to make the band any size you like.
I can vouch for the quality of the castings - and they will paint up beautifully in Gloss or matte.
Brian Harrison is the owner - and is a member on here - as Yeoman. He can send you a catalogue - if you PM him.
Just in case you didn't know. All the best - johnnybach