Office 2000 installation with a W2K SP4

I want to install office 2k on a w2k PC with a sp4 installed. A sp4 CD is needed to continue the office intallation but I don`t have the CD since sp4 was installed using a dowload file from microsoft site. There is no way I can point office installtion to the i386 saved on my hard disk and I cannot install the SP4. What other options do I have besides of buying a sp4 from microsoft?