Often a marine repair facility will do a nice repair if your 'favorite' RV dealer can't. As a DIY project, might not be such a good idea unless you have a bunch of tools and you know how to work on whatever that nose cap is made from - it isn't necessarily fiberglass - plus match the paint color. Duct tape or an even better material is a thin silver sealing tape usually found in the heating section of Home Depot or Lowe's and will last until it can be fixed. Myself, I would leave it until the summer camping season is over and then get it done when you can leave the trailer for a couple weeks.
Dave W along with my DW, Susan and our poodlepups, Callie & Molly,2011 Ford F250 6.7 CCLB, 5er Hitch Option w/B&W Hitch,,Ride Rite air bags, 2014 Montana High Country 343RL (38')