Murph, the stabilizer bar attaches to a point on the bottom side of the axle and is held on with a clinch pin. I now use the heavy duty spring clinch pins that cost a bit more but brush won't snatch them off causing one to bend a stabilizer bar. Measure from attachment point at the axle to the swivel of one of the lift arms. One would slide the lift arm on a three point hitch and slide a stabilizer bar one then snap on a clinch pin. The check chain keeps the lift arms from hitting the wheels. I could not find a replacement for my bend stabilizer bar locally (original). so I bought two adjustable ones at TSC. Screwed them out to match the old ones length and set the lock nuts. They look kind of like the top link except they have eyelets instead of swivels.
As for your headlight bulb, just buy an ordinary flood bulb 12v of same size. They shouldn't cost $32 a bulb. No high low. The same bulb on the plough light is the same for the headlight. Use a GE 4419. They are 5 3/4" They should be around 10 to 12 bucks each.