Aside from various recordings of Nicolai's Merry Wives of Windsor (and the
excerpted overture) as well as Sullivan's incidental music for the Merry
Wives, a search of www.cdnow.com on "windsor" turns up:

America Sings: Vol. 1-Founding Years   CD  $9.49
Label: VOX BOX 2  5080
Anonymous: Windsor (Thomas Walter's Grounds and Rules of Musick E

J. Strauss: Evening In Vienna   CD  $5.97
Label: IMP CLASSICS (UK)  902
Strauss, Johann II: Windsor Echoes for orchestra, Op 104

Abel/Bach,J.C./Linley/Straube: Music For Gainsborough   CD  $15.49
Label: SIGNUM (UK)  26
Straube, Rudolf: Windsor Forest

E. Brown: Centering/Windsor Jambs/Tracki   CD  $15.49
Label: NEWPORT CLASSIC  85631
Brown, Earle: Windsor Jambs for voice, flute, bass clarinet, viol

J.Jr. Strauss: Vol. 17   CD  $14.49
Label: MARCO POLO  8223217
Strauss, Johann II: Windsor-Klange, waltzes for orchestra, Op 104

Of these, I'd look closely at the Straube, since he's roughly contemporary
with (a very young) Haydn.

Steve Schwartz