Try an A-Frame
Mainbrace, the C-22 association magazine has in the past had articles showing how to use a simple A-frame to help in raising and lowering your mast. I made mine out of a couple of lodgepole pine, joined together with a bolt that holds a couple of sturdy clips that can then attach to the forestay and to a line that can be controlled by hand from near the bow (or to the trailer winch cable if you are using one). The bases of the A-frame attach where the front shrouds attach (by small lines)and I set them on a couple of padded chunks of plywood. The frame is about 8 or 9 ft. tall I think. Also I use a brace that fits into the two gudgeons after removal of the rudder. It has 2 positions, one about 6 ft above the rail on the transom and the other even with the cabin. The higher helps set the angle for raising, the lower is for storage or travel. This was made with from a 2 x 4, and a little plywood for the yokes. This came with my old boat; not sure where they got the pintels but they are similar to those on the rudder. My wife and I can now raise and lower the mast fairly easily.