What I have done for an oil pressure source on my 300 SDL's and am about to use on my E300TD (for a pre/post luber) is have a machinist fab a T fitting of steel.
Secure the proper thread diameter and pitch from an oil pressure sender. The male portion of the T goes into the pressure sender's former location in the filter housing. The pressure sender threads into the female portion of the T. The pressure source becomes the third opening of the T.
I've been using this system for my prelubers for years.
Since you are attempting to prolong engine life with the bypass filter, why not utilize a pre/post luber? It is much better to start an engine wet as opposed to dry. The system may be viewed at preluber.com - unless they have changed the site.