Iíve gone through several other brands of awnings, Fiamma is by far the easiest to operate, I dare say, even for a single senior female.....
They are spendy, but youíll actually use it, vs. some of the others that require 2 people to set up and stow away or are too complicated to bother, Iíve dealt with both before getting our Fiamma. See if you can order the proper brackets required for the Promaster from somewhere, SMB or another up fitter and contact member 1der for the awning. Where are you located? maybe thereís a shop that could install for you nearby.