We were there before: GC Chemstation B.04.03 SP2

As certainly has happened to others before, losing a HD we are now stuck missing one intermediate step from our DVD B.04.03 (13) via B.04.03 DSP (53) towards the minimum requirement B.04.03 SP1 (87) necessary to install G2070-60144 (B.04.03 SP2) and the following hotfixes.

Can´t locate B.04.03 SP1 anymore, old hard disk parted with us non-spinning.

Anyone able to leave a pointer to this B.04.03 SP1?
Much appreciated and thanks for looking into your drawers!