you can search for mini driving equipment and you come up with a bunch of site. Also most of the regular suppliers can get you equipment.
www.carriagedrivingessentials.com
www.drivingessentials.com
to name a few.
Long lineing, Since it is difficult and I often get lines tangled up in my wheels, I usually start with a side rein on the outside and one line on the inside and work on bend and suppleness. The line on the inside runs from the bit to the shaft loop or a ring on a surcingle or stirrup on a saddle. Then when I add an outside rein, I still often keep the outside side rein on because of the difficulty of managing long lines in a chair:) I have to be on a hard packed surface to be most affective if I’m in sand I am stationary but I can still accomplish some stuff. You have to be adept at the lines going over your head because I cannot walk in a circle (goes against a lot of how things are taught) but one must make adjustments with what they can do. I don’t get to advanced with my long lineing or ground driving. Because it is to easy to lose forward and no one can walk as fast as a horse can. I don’t care how able-bodied you might be:-)
As for changeing bend while long lineing I suck at that:-) I wait until I’m driving the horse. But driving is the same as long lineing. You would start to change the bend of the horse by half-halting the outside rein as the horse starts to change bend you give with the inside rein a tad but not to much this is now your new outside rein, then if you need more aide for bend you use your whip on the new inside hip of your horse to ask him to step underneath himself. If the horse needs more bend at the poll, I half-halt when the inside front leg hits the ground, if the horse needs more bend in the body I half-halt with the inside hind leg when it hits the ground.
So after the initial basic work they understand, turning, basic bending and some contact and they don’t seem like they are going to run away, I feel it is time to move on to getting them hitched because driving them because I can accomplish more. When you go to hitch you need extra bodies…