I see where there are lots attachments for smaller tractors @ titan and everything attachments. But I am trying to find a cultivator and planter that are adjustable and that will cover the 78" tracks. I thought that everything attachments might have what I needed but he did not seem to want to talk much, so I could not pick his brain.
There are multiple types of cultivators but I suspect you are probably talking about a row crop cultivator if you mention also needing a planter. These are bought by number of rows they cover and the spacing between the rows (e.g. a four-row planter with 30" row spacing) rather than overall width. These are run with the tractor's wheels straddling two rows, so the row spacing can't be more than half of the maximum wheel centerline spacing for your tractor, or you won't be able to straddle the rows. Common spacings are 30" and 38", which would work to 60" and 76" centerline spacing. Planters and row crop cultivators bolt to a toolbar so you could run a nonstandard spacing if you need to by unbolting the sweeps or planter boxes, moving them to your desired spacing, and bolting back down.
Usually things like this are bought used as 4-8 row cultivators and planters are widely available on the used market. These were how weed control was done before Roundup Ready crops came out, and were sized for the ag tractors of the day, which would be the size of full-sized utility tractors today. Finding a new one is less common as new planters are huge and little row crop cultivation is still done, and what is done uses 12+ row equipment. The compact tractor equipment vendors selling to suburbanites and horse people don't sell this equipment as those people rarely buy that kind of equipment, they buy rototillers and broadcast seeders for gardens and food plots, they are not row-cropping. Thus, you are going to be looking at something targeted at market farmers (aka truck farmers, which is a small, specialized market) or buying older used equipment from the '60s and '70s.
The issue you would have with used equipment is that your tractor is a compact and has a category 1 3-point. The used row crop cultivators are and planters are generally category 2/3, and certainly anything wider than a four-row would be too heavy to work with your tractor, maybe even a four-row unit would be pushing it. At the very least you would have to weld on category 1 3-point mounts to a used unit.
If you want to buy something that would work out of the box, then I think something like this
Yetter setup would work as they make smaller toolbars for category 1 tractors for planters and cultivators in addition to the larger category 3/4 stuff for the ag market. You would buy two toolbars and put planter boxes on one, and cultivator sweeps on the other. I suspect "bring money and lots of it" would probably apply if you went this route. The other option would be to try to find a 1940s-1950s era two-row 3 point mount planter and cultivator for a Ford 8N and the like as those are category 1. Those are out there but often you have to look for them, and they would have been sitting in a fenceline for half a century or more and probably need some work to make usable.