This article is from the NYPD Blue FAQ, by Dave Chapman, Alan Sepinwall and Jeff Knapp with numerous contributions by others.
Yes. The CD is entitled "Inventions from the Blue Line", it's
by Mike Post and is published by American Gramaphone, 9130
Mormon Bridge Road, Omaha, NE 68152. The catalog number is
AGCD 450 for the CD, and AGC 450 for the cassette.
It contains the NYPD Blue theme, 5 other NYPD Blue tracks and
4 other Mike Post themes - Law & Order, Silk Stalkings,
Renegade and Cop Files.
In the US it should be available at any large record store. It
has probably now got a UK distributor as it has been spotted
for sale in various large stores in London without an "Import"
sticker on it.
Any large record shop anywhere in the world should be able to
order it for you from the US if you give them the above