A 7753 works fine with with a DW build...if you do search...I've build one with a 7753. The day/date wheel plate makes up for the extra thickiness. A 7752 is a waste for a Rolex build, because you can use it for a Panerai build.
OP...swiss 7750 tri-compax movements do exists, but are rare to find. Zeno, Coifman, and other "micro-brands" used these movements for their builds. You can usually find them on E-Bay for around $200-$400.