Start with the John E. West arrangement. It is found in The Organ Music of Handel (Novello, out of copyright). You can download it directly from IMSLP.
If you need something quickly for a church service, "easy" versions in C major (rather than the original D major) are available for players looking for a more accessible layout.
Despite being written for orchestra, the "Hornpipe" is essentially —voices answer each other, and the bass line is independent. This polyphonic texture makes it an ideal candidate for the organ, an instrument built on clarity of voice-leading. handel hornpipe organ pdf
On July 17, 1717, King George I of Great Britain requested a concert on the River Thames. Handel, then the king’s court composer, wrote a collection of over 20 dance movements grouped into three suites. The orchestra performed from a barge while the king and his guests listened from the royal barge.
