Softpaq recommended 
by Compaq and the AeroFAQ:

SP1714.EXE
ftp://ftp.compaq.com/pub/softpaq/sp1501-2000/sp1714.exe
ftp://ftp.compaq.com/pub/softpaq/sp1501-2000/sp1714.txt
590K
02 May 96
Softpaq Solution: SP1714
Part Number: 181526-001
Title: Compaq Mouse Driver
Version: 6.44
Language: English
CATEGORY: Driver / Miscellaneous
EFFECTIVE DATE: 05 May 1996
PRODUCTS AFFECTED: Contura Aero Family etc.
OPERATING SYSTEM: MS DOS/MS Windows
DESCRIPTION: This softpaq provides driver support for the Compaq Mouse for both MS DOS and MS Windows 3.1x.

Note: I can recommend this driver if you are receiving growstub fatal errors - for instance after installing Internet Explorer on Windows 3.1 System.