please do not fear for the tasteful engraving on the receiver of my M 88, this is for another project. as you can see on the zeiss ziel 4 with "schiene" it will be also wrong for a M 88.
what you need for your rifle is a older scope like this
http://www.egun.de/market/item.php?id=2329323&PHPSESSID=86442d3912f9cad6ce053c05bcc01ccd
and you would not believe what I have

SEM Hinterfuß for Mannlicher Schönauer mount

and this part can be use to make a Vorderfuß
http://www.egun.de/market/item.php?id=2317679&PHPSESSID=86442d3912f9cad6ce053c05bcc01ccd

of course the parts need to be milled down on top and have to get a ring for the scope