My transmission line busted right here at this junction box. I think it’s the transmission fluid cooler bypass valve but I could be wrong. Anyway I can’t find this part or the hoes anywhere.

 

Some stores have the equip to make hydraulic hoses.Check around.
If not, check different places that handle hydraulic parts and all they need is the size of the fittings and length of the hose. From the looks of the pix looks like you might need a few. Some will request you bring in the old hose so they can get the sizes right.

If you have a local yellow pages for your area , they would be listed in there , under "hydraulic parts".