Covers are always an interesting topic. Is your Divemaster a commercial version of the Montauk? If so, you can almost certainly find a semi-custom cover made by Carver. I'm not sure what you mean by the "pulpit". Does your boat have a bow pulpit for anchor storage? If there is an actual pulpit that extends forward from the bow a Carver cover may not be available.
I've owned four Carver covers since 1999. All have been excellent covers and worn well. One was replaced under warranty which is a declining value warranty. Three covers have been of Sunbrella and one of Sundura (a less expensive lighter material recommended for damp, hot climates). I prefer the Sunbrella for it's color fastness and the Sundura for it's lighter weight. For a 17 foot boat the weight of the Sunbrella vs the Sundura is inconsequential.
The fit is as good as a many custom covers I've seen and better than some. For the price I feel they are unbeatable.
Several colors are available. I've owned dark blue, white and red covers and I believe the red shows dirt the least and looks the best on a Boston Whaler.
Cover mounting when storing a boat on a trailer is very easy with a Carver cover. There are loops all around the cover perimeter sown into the edge hem which is very robust. The covers include a set of tie-down straps with friction buckles that go through the loops and then wrap around the trailer rails. The straps will stretch a little when first used but are easily snugged up by a tug on the end of the strap. The straps are designed to be secured to the loops and remain on the cover when it is removed. That way the straps never need readjustment. If you choose a Carver cover order a second set of straps as one set is not quite enough. On my covers I cut the straps after a few weeks to eliminate any excess material hanging down. I leave about an eight inch tail. It's nice not to have to add snaps or hooks to your boat to use a cover.
Carver covers are trailerable and I trailer our boats often with the cover in place. Never a problem but it's a nice option in case you ever choose to travel with your boat. The web site is
http://www.cavercovers.com but I recommend a telephone call to for any questions you may have.