Check out an Eagle One antenna. Steve is a great guy, made and sold these for a number of years. I have one I use for portable use like field day and when camping. I use the tripod since I don't have a ladder to mount to. It is a collapsible 31' vertical. He has the brackets for mounting to a ladder. I believe it is resonate on 40M and 15M but will require a tuner and a balun (I use a LDG 4:1) if desired for other freq. You can call Steve and get the information. He is now handicapped as a result of back surgery but is still able to travel with his MH and comes to a few Hamfests in the East. He comes quite often to Hamfests in the Atlanta area. Here is his web page, check it out. What he has is pretty much what you are interested in.
http://w8afx.com