TubeNet

You can order it directly from Wright & Round in the UK:

https://secure.wrightandround.com/

Just search for "Grandfather".

They're nice folks and they ship to the USA.

publisher: "F. Richardson Limited"

Just be sure to drop a note to the W&R folks if you order from them telling them exactly what you want--they often have these solos for both piano and brass band accompaniment. Make sure you get the one you want.

I don't know if this makes a difference to you, but whatever you buy is certain to be the TC and not the BC version. Over there in the UK, they don't hold with Euphonium BC parts.

Haha, ive also heard this piece along with Pictures*..... and many more at a school Band Trip last year. Little did I know what famous music I was listening to. Is the Grandfather clock the euph solo where everything is open ???????????