I have accidentally found this volume online at Google books from a search on “cramer catena”. It is here. I could wish that I had known this before seeking out physical copies and paying for photocopies. The authors used in the catena are listed at the back, with page references. It contains a number of passages from the “Quaestiones ad Marinum”.
The other catenae published by John Cramer are listed at Google books, but with no content. Let’s hope that they come online too.
PS: I have just found the catena on 1 Corinthians online too here. Also his Anecdota Graeca from various manuscript collections. As ever, a list of authors quoted and page numbers is at the back.